Ginkgo biloba

0

Pronunciation key

( giŋkō )
( jiŋkō )

ging•ko

[ giŋkō ]

n.

[pl. GINGKOES (-kōz)], a ginkgo.


gink•go

n.

[pl. GINKGOES (-kōz)]

[Japan. ginko, gingko < Chinese yin-hing, silver apricot].

  1. A large tree with fan-shaped leaves and edible yellow fruit native to northern China and Japan.

maid•en•hair

[mādʼn-hâr′]

n.

  1. Any of a group of ferns with delicate fronds and slender stalks: also called maidenhair fern.
  2. The ginko. Maidenhair tree

The Maidenhair Tree (Ginkgo biloba) is of a monotypic genus, the only living representative of an extensive ancient Order of conifer-like trees. It is neither a broadleafed, 'flowering' tree nor a conifer. It is a Ginkgo and the only remaining member in an Order of plants which were a worldwide, dominant tree form around 150 million years ago and are unrelated to any living plant. The Ginkgo is the most primitive extant land plant which evolved during a time in Earth history when a branching, network system of veins had not yet became available among plants. Therefore, a broad leaf from a close fan of radiating veins was developed. Similar to the most primitive conifers, the opposing genders, male and female, are on separate trees with one distinguishing characteristic, it sheds it leaves in winter. Ginkgo was named for the Japanese word for the plant and nuts. The nut has a silver color. The word ginkgo derives from the Chinese and Japanese words for silver nut or silver apricot.

Taxonomic Hierarchy
Ginkgo biloba
Kingdom Plantae – Vegetal, plants
Subkingdom Viridaeplantae – green plants
Infrakingdom Streptophyta – land plants
Division Tracheophyta – vascular plants, tracheophytes
Subdivision Spermatophytina – spermatophytes, seed plants
Infradivision Gymnospermae – gymnosperms, gymnospermes, gimnosperma
Class Ginkgoopsida – ginkgo
Order Ginkgoales
Family Ginkgoaceae
Genus Ginkgo L. – ginkgo
Species Ginkgo biloba L. – maidenhair tree, common ginkgo

Ginkgo biloba is the only remaining (extant) species of the family Ginkgoaceae which were Gymnosperms that existed around 175-200 million years ago. It is a medium-sized, deciduous tree which matures to about 36-40 meters (120-130 ft) in height and 2.5 meters (8 feet) in diameter. The fan-shaped leaves have two lobes and parallel veins. Male trees produce cones and the female produce pairs of ovules or seeds on the ends of the flower stalk. Upon ripening, the fleshy seeds fall to the ground and produce a foul odor.
The species orginates from southeastern China where it was commonly cultivated in China and Japan to landscape monasteries and temple grounds, but now has worldwide distribution. They perform well in moderate climates and are common cultivated in Europe and North America to adorn avenues.
The Chinese also used ginkgo extracts for medicinal purposes and scientists have synthesized a compound found in ginkgoes in therapy for asthma and some other illnesses.
The precise origin of the ginkgo remains uncertain but believed to have originated from seed ferns, extinct groups of gymnosperms.

The Maidenhair Tree is sacred in the traditions of Buddhist religion and was cultivated for many centuries in China and Japan. It was rediscovered long ago growing in temple gardens of China where the sacred trees were carefully tended and perpetuated. It became known to Western science in the eighteenth century when the first specimens were introduced in Europe. Historically it was believed the species was saved from extinction through cultivation in the Far East, but now good evidence exists for believing the species occurs in a wild state at the borders of Chekiang and Anhwei provinces in southeastern China. (In 1956, a small population of Ginkgo trees were reported growing in a wild state.) This was claimed to be the last natural refuge for the once prominent constituent of Mesozoic and early Tertiary floras of the Northern Hemisphere.

For the past 250 years the tree has been planted widely and grown successfully under many different conditions of soil and climate. Remarkably the species appears to be free of disease and resistant to pests (fungus and insects) and air pollution.

Ginkgo Evolution

A-C: Evolution of ginkgophyte leaves. Jurassic.
A Highly dissected leaf of Ginkogoites minuta.
B Lobed leaf of G. taeniata.
C Ginkgoidium with entire margin and single median sinus.

A-C redrawn from Harris, 1935.

D Ginkgo digitata. Jurassic.
E G. lamariensis. Cretaceous. (D, E redrawn from Brown, 1943).

Redrawn from Paleobotany and the Evolution of Plants, 2nd Edition, Cambridge University Press ©1993

The Order Ginkgoales flourished primarily during the Mesozoic era, achieving its greatest evolutionary developments during the Jurassic period (about 150 million years ago) when dinosaurs dominated the earth. The genus Ginkgo itself probably extends back to this period. The group was very rich in diversity, some of them certainly represent distinct genera. Ginkgo enjoyed a worldwide distribution and no doubt important constituents of the flora. Fossil leaf remains are often found abundantly in detaic sediments laid down during the Mesozoic. Ginkgo declined toward the close of the Mesozoic era. This decline continued during the Tertiary and today only one species remains making it a monotypic genus. Seward observed in 1919, "Ginkgo biloba L., has a preeminent claim to be described in Darwin's words as a living fossil."
According to Encyclopedia Britannica Micropedia ©1984:

"...the only living representative of the order Ginkogoales, a group of gymnosperms composed of the family Ginkogoaceae, approximately 15 genera that date from the Permian Period of the Paleozoic Era, some 225,000,000 to 280,000,000 years ago. Extinct genera, such as Ginkgoites and Baiera, are known from fossilized leaves that are similar to those of the present-day tree."

Botanists have referred to it as a "missing link" between flowering plants and ferns.

The habit of Ginkgo is similar to Glossopteris and some conifers, with a main trunk which bears branches with axillary long and short shoots. Characteristically, often reniform to fan-shaped leaves. They have slender and long petioles (stalks) and scattered on the shoots or crowded at the distal ends of the slowly-maturing short shoots, and are covered with leaf scars. Ginkgo forms a massive tree, and old specimens, some having estimated to have lived more than one thousand years old developed to a very large size. In the juvenile tree there is often a strong leader, forming the main trunk. Branches are somewhat straggly, giving the tree its rather distinctive appearance during the winter season in its leafless condition.

Ginkgo tree
Ginkgo in winter. Edited and redrawn from Tet Borsig, Collier's Encyclopedia ©1960
Larger branches of the ginkgo are covered with dwarf branches, called spurs, which are slow growing but bear leaves annually.
Ginkgo leaves are peculiar, having a wedge-shaped leaf blade borne on a long-stalk (petiole). Venation consists of an open forking system that lack vein fusions. The delicate fern-like foliage and shape of the lamina account for the tree's English popular name of "Maidenhair Tree". The leathery leaves are up to eight centimeters (three inches) in length, and often twice as broad. Dull gray green to yellow green in summer, and in the early or middle autumn, the foliage turns a brilliant shade of pale yellow, then to a rich gold and some more on the side of a pale orange before breaking off late in the season.

Ginkgo foliage
Silhouettes of Ginkgo biloba leaves which reveal a range of variations in size and external morphology.

(paraphrased)"If a paleobotanist were to find a fossil leaf from a short and long shoot, they may be inclined to group them as different species. Not everyone would take cognizance of such possible variations when describing individual fossils and other structures."
Redrawn from Figure 27.2 in Paleobotany and the Evolution of Plants, 2nd Edition, Cambridge University Press ©1993

Ginkgo shows a considerably variegated size and form in its foliage ranging from a bilobed leaf to those of rapidly growing long shoots where the lamina which are deeply divided into cuneate segments, or those of short shoots where the smaller leaves may have margins that are entire.

Ginkgo consist separately of male and female trees. It appears most earlier specimens planted in Europe, were male. The first female specimen was recorded to have grown near Geneva in 1814. Some trees in cultivation have had branches of the opposite sex grafted onto them.

Pollen-bearing cones are not especially distinctive, being similar to the male cones of conifers in a general way. Seeds are usually produced in pairs but often on stalks that appear to be morphologically equivalent to the male cones. Both are carried on leafy dwarf-shoots. There are no female cones among Ginkgo comparable to conifers. The females bear ovules on megasporophylls and males develop pollen on microssporophylls. Pollination is effected by wind.

It shares only a few features in common with cycads, the dwarfish, hard-leafed palm-like plants notably cultivated along the Gulf Coast which bear central cone-like structures, however it remains completely unrelated in any direct way to cycads or any other extant plant or tree species. The most remarkable feature of the reproductive cycle in Ginkgo is the presence of sperm (swimming male cells) similar to those of cycads. Several features of seed development are similar in cycads and Ginkgo. However, this does not indicate a close relationship, rather it indicates similarity in primitive features retained by these extraordinary ancient and primitive plant species.

Ginkgos grow well in many temperate regions with exception to cold northern regions. Ginkgo are fairly impartial to soil type, as long as it is fertile, and grow best in a sunny location. They make for imposing trees and are often planted in avenues. They are tolerant of pollution, therefore make useful trees to cultivate in industrial areas. Cultivars available include 'Fastigiata,' a columnar form with semierect branches, 'Pendula,' with weeping branches, and 'Tremonia,' which as a conical form.

Ginkgo biloba
Ginkgo biloba produces fan-shaped leaves and clusters of tiny flowers. The fruit yields a sweetened nutlike seed which is valued in China as a delicacy.
Redrawn from Grolier Encyclopedia of Knowledge ©1991

Female trees bear paired ovules that when fertilized develop into yellowish, plumlike seeds about 2.5 centimeters (1 inch) in length, and consist of a large nut surrounded by a fleshy outer covering. The nut itself is silver colored.

The fissured bark is gray in color, deeply furrowed on older trees and has a corky texture. The light-colored wood, soft and weak has limited economic value.
Ripe ovules, or the mature seeds, have a soft, yellowish-orange fleshy outer layer. Fruit is abundant on female trees. When located in populated areas they tend to be tread on and create a messy pulp underfoot which notably has an unpleasant odor of rancid butter. Also, notably the female trees tend to bear long, low, sinuous branches which would block traffic while the male tend to be slender and tall. For this reason male trees are usually preferred for avenue planting, though in some locations males and females are planted side by side, the same shape. In the Orient, when cleansed and washed it produces a pure white seed kernel consisting of an inner oval nut which contains a sweet, oily, edible seed that is sometimes roasted and eaten, and traditionally regarded as an edible delicacy.

Evolutionary Development and Decline

The origins of Ginkgoales appear to be with Paleozoic ancestry which by the end of the Triassic became an important part of Mesozoic floras. During the Jurassic, especially the Middle Jurassic, the Ginkgoales reached the height of their numbers in species variation and worldwide distribution. A survey of Jurassic and Cretaceous localities shows us that the ginkophytes were circumpolar, making appearances in Alaska, Greenland, Scandanavia, Franz Joseph Land, Siberia, and Mongolia. The Siberian locations have proved extremely productive. Locations in western Canada and the continental United States have rendered fossilized leaf remains of Ginkgoites from the Upper Mesozoic and Lower Tertiary deposits. Locales in Patagonia south to the tip of South America, South Africa, India, Australia and New Zealand bear witness that Ginkgoales were not confined exclusively to those regions that are now a part of the Northern Hemisphere. Many areas are known in Europe, including those in England, Scotland, Germany, Italy, Hungary, Turkestan and Afghanistan. Many locations have been noted by Seward in 1919, and Harris in 1974. Toward the close of the Cretaceous, the Ginkgoales were in decline, not only in worldwide distribution but in the number of genera and species.

During the Tertiary a decline of ginkgophytes has been recorded. By the beginning of the Oligocene epoch only 2 out of about 19 species remained. One of these is Ginkgo adiantoides, though not abundant, has been found in parts of western Canada in the Upper Cretaceous-Tertiary (Paleocene) deposits. In the Eocene, fossils of G. adiantoides have been more abundantly recovered, which suggests a cooling trend favorable to wider dispersal into locations which include Alaska, Alberta, British Columbia, Montana, South Dakota and Wyoming. The paucity of G. adiantoides preserved during the Oligocene attests to a sharp decline that continued into the Miocene of western North America. During the Miocene the species disappeared from the fossil record in that part of the world. But in Europe, it is reported to have continued to proliferate into the Pliocene. Since that time, our present evidence indicates Ginkgoales has been represented only by the one extant monotypic "living fossil" known as Ginkgo biloba.

Mesozoic and Tertiary Ginkgoales

The abundance of fossilized compression-imprinted leaves available to paleobotany from the Mesozoic and Tertiary deposits have presented diverse problems in their identification and assigning names to species. One author suggested that it might be appropriate to assign all species of ginkgophyte forms into two or three species instead of the many that have been described in literature over past decades.

Most experts disagree on grounds this is a poor solution and would not properly express the great diversity that occurred within the group, especially during the Jurassic. Since the introduction of studies by Harris in 1935, on Ginkgo-like leaf compression-impression fossils utilizing the characteristics of epidermal and stomatal structures, it is possible with well-preserved material to distinguish what appear to be defined species.

Distinction among genera however, still offers significant problems of nomenclature. Many authors follow the system used by Seward in 1919, who used the genus Ginkgoites for all fossil leaves sharing similarity with Ginkgo biloba although indistinguishable from the extant species. This system however gives rise to the presumption that Ginkgo did not have a fossil record. In an effort to avoid this erroneous approach, some investigators have included those leaf fossils that are indistinguishable from leaves of the modern Ginkgo in the genus but used different species names. Those fossilized Ginkgo-like leaf remains, which can be distinguished from Ginkgo by their morphological and anatomical characteristics, are placed by Harris and Florin (1935 and 1936) in the genus Ginkgoites.

During the Mesozoic both Ginkgo and Ginkgoites leaves are widely distributed, those of Ginkgoites appearing in the late Triassic are far more abundant in Mesozoic rocks. Ginkgo fossils appear in the Jurassic but became much more extensive during the Tertiary. Of the seven or eight Mesozoic leaf genera included in the Ginkgoales (Harris, 1935, 1974) the two having the largest number of species are Ginkgoites and Baiera.

Reproductive Structures

In 1976, Hughes emphasized in his work that what we search for in the fossil record for discoveries about the ginkophyte reproductive structures are strongly influenced by what we already know of Ginkgo biloba. That is neglecting to remember that Jurassic and Cretaceous ginkogophytes were highly diversified and one species can not be universally representative of the extinct varieties. Therefore it is likely that fructifications belonging to ginkgophytes that have been recovered and documented but have failed to be correctly recognized. The ovulate structures of Ginkgo biloba can provide only some clues as to the morphology of other, extinct fossilized forms.

Abnormal development of Ginkgo biloba ovulate structures.
Ginkgo reproductive structures
Abnormal development of Ginkgo biloba ovulate structures.

A Ovule formed on expanded lamina of a leaf.
B Highly branched stalk bearing a terminal ovule on each branch. (A, B, redrawn from Chamberlain, 1935) A, B, Extant and Paleobotany and the Evolution of Plants, 2nd Edition, Cambridge University Press ©1993

Associated with the Jurassic and Cretaceous, some Ginkgo-like remains of ovules named Allicospermum (Harris, 1935) which bear resemblance to ovules of Ginkgo biloba and cycads. Karkenia (1965) from the Cretaceous of Argentina, consists of over 100 or more small ovules crowded on a short stalk. Each of the ovules possesses a projecting microphyl and a short pedicel. The fructifications are associated with Ginkgoites tigrensis and considered to belong to the same species.

Fossilized material from the Yorkshire Jurassic beds have contributed a lot to current knowledge about ginkgophyte fructifications. In 1976, Harris was able to report paired ovules joined by a pad of tissue with Ginkgo-like stomata. These occur in beds with abundant Ginkgoites huttoni where a search for pollen organs of the Ginkgo type was rewarded (van Konijnenburg-van Cittert, 1971). The organ is a small pollen-bearing catkin with pairs of microsporangia on the tips of relatively lax stalks attached to an axis about 5 mm. long. The fossilized pollen sample obtained from it was monocolpate and similar to G. biloba. Only a few other verified fossilized ginkophyte reproductive structures have been recovered.

References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Paleobotany and the Evolution of Plants, 2nd Edition, Cambridge University Press ©1993
  • Biology of Plants, Fourth Edition, Worth Publishers Inc., Stanford University, Peter H. Raven and Helena Curtis, ©1971
  • The Trees of North America, Alan Mitchell ©1987
  • Grolier Encyclopedia of Knowledge ©1991
  • Ginkgo biloba L., Taxonomic Serial No.: 183269
  • The American Peoples Encyclopedia ©1960
  • Encyclopedia Britannica Micropedia ©1984
  • Funk and Wagnalls Encyclopedia ©1950
  • Collier's Encyclopedia ©1960
  • Zoology Quest: Ginkgoinae
  • Offsite

  • Palaeobiology: The missing link in Ginkgo evolution
  • Ginkgo is living fossil
  • Read More »

    Pectinate

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    Pronunciation key

    ( pektə-nāt′ )

    pec•ti•nate

    Pectinate leaf
    Pectinate leaf

    adj.

    [L. pectinatus pp. of pectinare to comb < pecten a comb].

    1. Having toothlike projections like those on a comb.

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Chart of Leaf Shapes
  • Read More »

    Ovate

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    Pronunciation key

    ( ōvāt )

    o•vate

    Ovate leaf
    Ovate leaf

    adj.

    [L. ovatus < ovum, an egg].

    1. Egg-shaped.
    2. In botany,
      • possessing the shape of a longitudinal section of an egg.
      • having a shape as such with the broadest end at the base as do some leaves.
    Ovate leaf
    Ovate leaf

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Chart of Leaf Shapes
  • Read More »

    Lanceolate

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    Pronunciation key

    ( lansi-ə-lit )
    ( lansi-ə-lāt′ )

    lan•ce•o•late

    Lanceolate leaf
    Lanceolate leaf

    adj.

    [LL. lanceolatus < lanceola, dim.; see LANCE (spear)].

    1. Tapering, narrow like the head of a lance: said of some leaves.
    Lanceolate leaf
    Lanceolate leaf

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Chart of Leaf Shapes
  • Read More »

    Deltoid ( and Deltate )

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    Pronunciation key

    ( deltoid )

    del•toid

    adj.

    Deltate
    Deltate

    [Gr. deltoeidēs < delta (Δ) + eidos, form ].

    1. Triangular, shaped like a delta.
    2. Designates or of triangular shoulder muscle, responsible for raising the arm away from the side.

    n.

    1. This muscle.
    Deltoid
    Deltoid

    References and Further Reading

  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Zoology Quest: Chart of Leaf Shapes
  • Read More »

    Petiolate

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    Pronunciation key

    ( peti-ə-lāt′ )

    pet•i•o•late []

    adj.

    [Mod. L. petiolus; L., a little foot, little leg, stalk, dim < pes, pedis a foot; petiole + ate].

    Petiolate
    Petiolate
    1. in botany and zoology, having a stalk or stalk-like properties.

     

     

    both Funk & Wagnalls and Websters Dictionaries state this term is spelled Petiolate, while Firefly Encyclopedia of Trees states the spelling is Petoliate. I am under the impression this was simply a typo behalf on the printer and have opted for the dictionaries spelling. My hope is that I have chosen correctly.

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Funk and Wagnalls Standard Dictionary, Comprehensive International Edition ©1976
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Chart of Leaf Arrangement and Attachment
  • Read More »

    Decurrent

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    Pronunciation key

    ( di-kũrənt )

    de•cur•rent

    adj.

    Decurrent
    Decurrent

    [L. decurrens ppr. of decurrere < de-, down + currere, to run].

    1. in botany, extending down along the stem, as the base of some leaves.

    References and Further Reading

  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Zoology Quest: Chart of Leaf Arrangement and Attachment
  • Read More »

    Runcinate

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    Pronunciation key

    ( runsi-nit )
    ( runsi-nāt′ )

    run•ci•nate

    adj.

    Runcinate
    Runcinate

    [L. runcinatus pp. of runcinare, to plane off < runcina, a plane (formerly understood as "saw")].

    1. irregular saw-toothed, with teeth or lobes curved backwards as in some leaves.

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Leaf Margins Chart
  • Read More »

    Emarginate

    0

    Pronunciation key

    ( i-märjə-nit )
    ( i-märjə-nāt′)

    e•mar•gi•nate

    Emarginate leaf
    Emarginate leaf

    adj.

    [L. emarginatus see E- and MARGINATE].

    1. having a notched margin or tip, as with some leaves or wings.
    Emarginate leaf
    Emarginate leaf tip

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Firefly Encyclopedia of Trees, Edited by Steve Cafferty M.Sc. ©2005
  • Zoology Quest: Leaf Tip Type Chart
  • Read More »

    Gasteromycetes

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    Gasteromycetes

    Gasteromycetes is an invalid term once commonly used for classification of fungi. The accepted term is now Basidiomycetes.

    Gasteromycetes included puffballs, earthstars, bird's nest fungi and stinkhorns. They differed from the pore and gill fungi in that all have a peridium over the spore-bearing surface. The peridium, usually several layers thick, ruptures and exposes the spores when they are ripe and fallen off the basidia. When spores are prepared for dispersal they may be scattered by wind, rain or animals. Black spore clouds will be released from a puffball if ruptured. In some bird's nest fungi the spore containing peridioles are splashed out of the cup by rain. In some, the sticky peridiole is equipped with a cord that helps to entangle and hold it to a surface until it splits and releases the spores.

    Characteristically, the Gasteromycetes growth occured in soil; some growing in decaying wood. Some species classed in this group grew singly, others in clumps. Fruiting seasons were variegated according to each species and region, but typically the most favorable months were July, August and September.

    References and Further Reading

  • A Golden Guide: Non-Flowering Plants ©1967
  • Read More »

    Hymenomycetes

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    Hymenomycetes

    Invalid classification (here). Current accepted name is basidiomycetes.

    The term was applied to a natural group classed in earlier systems as "true basidiomycetes".

    The hymenomycetes were a large, important and heterogeneous group. Their basic characteristic was that each exposes its hymenium (the fertile layer of basidia) before the spores have completed maturing. Hymenomycetes included the coral, tooth and leather, pore, and gill fungi.

    References and Further Reading

  • A Golden Guide: Non-Flowering Plants ©1967
  • Read More »

    Synura uvella

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    Synura uvella

    Found commonly in lakes and ponds. The cells of synura are joined to form a spherical colony. Each cell possesses two flagella.

    Taxonomic Hierarchy
    synura uvella
    Kingdom Chromista
    Subkingdom Chromista
    Division Chrysophyta – golden-brown algae, chrysophycophytes
    Class Chrysophyceae
    Order Ochromonadales
    Family Synuraceae
    Genus Synura Ehrenberg, 1834
    Species Synura uvella Ehrenberg, 1834
    Synura uvella, Ehrenberg, 1834, Taxonomic Serial No.: 1656

    References

  • A Golden Guide: Non-Flowering Plants ©1967
  • Read More »

    Nostoc pruniforme

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    Nostoc pruniforme

    Taxonomic Hierarchy
    Nostoc pruniforme
    Kingdom Monera – monerans
    Phylum Cyanophycota – blue-green algae, cyanophytes
    Class Cyanophyceae
    Order Nostocales
    Family Nostocaceae
    Genus Nostoc Vaucher, 1888, Ex Bornet and Flahaul
    Species Nostoc pruniforme C. Agardh
    Nostoc pruniforme, C. Agardh, Taxonomic Serial No.: 1168

    References

  • A Golden Guide: Non-Flowering Plants ©1967
  • Read More »

    Embryophyte

    0

    Embryophyte

    In the traditional classification system, the plant kingdom was divided into the Thallophytes and Enbryophytes. In the former division are various groups of algae, fungi and lichens. The Embryophytes are a more complex group including remaining classes of non-flowering plants in addition to flowering groups. Thallophytes totalled some 100,000 species, which fell into 15 or more classes.

    Thallophytes
    Embryophytes

    References and Further Reading

  • Zoology Quest: Thallophyta
  • A Golden Guide - Non-Flowering Plants ©1967
  • Read More »

    Tracheophyta ( vascular plants )

    0

    Tracheophyta

    Some algal classes may have risen separately from others. Red algae may have come from blue-greens and others from the greens. Fungi perhaps arose directly from the flagellates. Bryophytes and later the vascular plants (those with a conducting system) may have evolved directly from green algae. Hornworts, although without roots or true leaves developed conductive tissues. True vascular tissues appear among early Psilotum-like plants. Over millions of years these species adapted to land, giving rise to more complex non-flowering species, the ferns and their allies, and gymnosperms. Finally to flowering plants.

    Taxonomic Hierarchy

    Land Plants with conductive and supporting tissues (vascular) first appeared around 400 million years ago. These samples represent some of the known fossils of non-flowering species occasionally discovered in coal.

    Ginkgo
    Ginkgo
    Horsetail
    Horsetail
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Streptophyta – land plants
    Division Tracheophyta – vascular plants, tracheophytes
    Direct Children:
    Subdivision Pteridophytina – pteridophytes
    Subdivision Spermatophytina – spermatophytes, seed plants
    Lycopod
    Lycopod
    Seed Fern
    Seed Fern
    Tracheophyta, Taxonomic Serial No.: 846496

    References and Further Reading

  • A Golden Guide: Non-Flowering Plants ©1967
  • Tracheophyta, Taxonomic Serial No.: 846496
  • Read More »

    Rockweed ( Fucus vesiculosus )

    0

    Rockweed
    Fucus vesiculosus

    Taxonomic Hierarchy
    Rockweed, Fucus vesiculosus
    Kingdom Chromista
    Subkingdom Chromista
    Division Phaeophyta – brown algae
    Class Phaeophyceae
    Order Fucales
    Family Fucaceae
    Genus Fucus
    Species Fucus vesiculosus
    Direct Children:
    Variety Fucus vesiculosus var. sphaerocarpus
    Fucus vesiculosus, Taxonomic Serial No.: 11335

    References

  • A Golden Guide: Non-Flowering Plants ©1967
  • Fucus vesiculosus, Taxonomic Serial No.: 11335
  • Read More »

    Sargassum Weed ( Sargassum vulgare )

    0

    Sargassum Weed

    Taxonomic Hierarchy
    Sargassum Weed ( Sargassum vulgare )
    Kingdom Chromista
    Subkingdom Chromista
    Division Phaeophyta – brown algae
    Class Phaeophyceae
    Order Fucales
    Family Sargassaceae
    Genus Sargassum C. Agardh
    Species Sargassum vulgare
    Direct Children:
    Variety Sargassum vulgare var. foliosissimum (Lamouroux) C. Agardh
    Variety Sargassum vulgare var. vulgare
    Sargassum vulgare, Taxonomic Serial No.: 11400

    References

  • A Golden Guide: Non-Flowering Plants ©1967
  • Sargassum vulgare, Taxonomic Serial No.: 11400
  • Read More »

    Sea Lettuce ( Ulva lactuca )

    0

    Sea Lettuce
    Ulva lactuca

    Taxonomic Hierarchy
    sea lettuce, ulva lactuca
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Chlorophyta – green algae
    Division Chlorophyta – green algae
    Subdivision Chlorophytina
    Class Ulvophyceae
    Order Ulvales
    Family Ulvaceae
    Genus Ulva Linnaeus, 1753
    Species Ulva lactuca Linnaeus, 1753
    Direct Children:
    Variety Ulva lactuca var. lacinulata
    Variety Ulva lactuca var. latissima
    Variety Ulva lactuca var. rigida
    Ulva lactuca, Linnaeus, 1753, Taxonomic Serial No.: 6562

    References

  • A Golden Guide: Non-Flowering Plants ©1967
  • Ulva lactuca Linnaeus, 1753, Taxonomic Serial No.: 6562
  • Read More »

    Merman's Shaving Brush ( Penicillus dumetosus )

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    Merman's Shaving Brush

    Taxonomic Hierarchy
    mermans shaving brush
    Merman's Shaving Brush
    Penicillus dumetosus
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Chlorophyta – green algae
    Division Chlorophyta – green algae
    Subdivision Chlorophytina
    Class Ulvophyceae
    Order Bryopsidales
    Family Udoteaceae
    Genus Penicillus J. B. de Lamarck, 1813

    References

  • A Golden Guide, Non-Flowering Plants ©1967
  • Penicillus J. B. de Lamarck, 1813, Taxonomic Serial No.: 6949
  • Read More »

    Caulerpa prolifera

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    Caulerpa prolifera

    Taxonomic Hierarchy
    Caulerpa prolifera
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Chlorophyta – green algae
    Division Chlorophyta – green algae
    Subdivision Chlorophytina
    Class Ulvophyceae
    Order Bryopsidales
    Family Caulerpaceae
    Genus Caulerpa J. V. F. Lamouroux, 1809
    Species Caulerpa prolifera (P. Forsskal) Lamouroux
    Direct Children:
    Variety Caulerpa prolifera var. prolifera P. Forsskal
    Variety Caulerpa prolifera var. zosterifolia
    Caulerpa prolifera, (P. Forsskal) Lamouroux, Taxonomic Serial No.: 6964

    References

  • A Golden Guide, Non-Flowering Plants ©1967
  • Caulerpa prolifera, (P. Forsskal) Lamouroux, Taxonomic Serial No.: 6964
  • Read More »

    Mermaid's Wine Glass ( Acetabularia crenulata )

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    Acetabularia crenulata

    Taxonomic Hierarchy
    Mermaid's Wine Glass ( Acetabularia crenulata )
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Chlorophyta – green algae
    Division Chlorophyta – green algae
    Subdivision Chlorophytina
    Class Ulvophyceae
    Order Dasycladales
    Family Dasycladaceae
    Genus Acetabularia J. V. F. Lamouroux, 1812
    Species Acetabularia crenulata
    Acetabularia crenulata, Taxonomic Serial No.: 9235

    References and Further Reading

  • A Golden Guide, Non Flowering Plants ©1967
  • Acetabularia crenulata, Taxonomic Serial No.: 9235
  • Read More »

    Dasya pedicellata

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    Dasya
    Dasya pedicellata

    Taxonomic Hierarchy
    Dasya pedicellata
    Kingdom Plantae – Vegetal, plants
    Subkingdom Biliphyta
    Division Rhodophyta – red algae
    Subdivision Rhodophytina
    Class Florideophyceae
    Order Ceramiales
    Family Dasyaceae
    Genus Dasya
    Species Dasya pedicellata (C. Agardh) C. Agardh
    Dasya pedicellata, (C. Agardh), Taxonomic Serial No.: 13404

    References

  • A Golden Guide Non-Flowering Plants ©1976
  • Dasya pedicellata, (C. Agardh), Taxonomic Serial No.: 13404
  • Read More »

    Laminaria ( Kelp )

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    Kelp

    Kelp, Laminaria agardhii
    Laminaria agardhii
    Taxonomic Hierarchy
    Kingdom Chromista
    Subkingdom Chromista
    Division Phaeophyta – brown algae
    Class Phaeophyceae
    Order Laminariales
    Family Laminariaceae
    Genus Laminaria

    At present the species Laminaria agardhii specified on this entry can not be verified on itis.gov, though the genus Laminaria itself is listed as valid.

    Laminaria, Taxonomic Serial No.: 11217

    References

  • A Golden Guide Non Flowering Plants, ©1967
  • Laminaria, Taxonomic Serial No.: 11217
  • Read More »

    Irish Moss ( Chondrus crispus )

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    Irish Moss

    Taxonomic Hierarchy
    Irish Moss, Chondrus crispus
    Kingdom Plantae – Vegetal, plants
    Subkingdom Biliphyta
    Division Rhodophyta – red algae
    Subdivision Rhodophytina
    Class Florideophyceae
    Order Gigartinales
    Family Gigartinaceae
    Genus Chondrus J. Stackhouse, 1797
    Species Chondrus crispus (Linnaeus) J. Stackhouse
    Chondrus crispus, (Linnaeus) J. Stackhouse, Taxonomic Serial No.: 12092

    References

  • A Golden Guide Non-Flowering Plants ©1967
  • Chondrus crispus, (Linnaeus) J. Stackhouse, Taxonomic Serial No.: 12092
  • Chondrus crispus (otherwise known as Irish Moss)
  • Read More »

    Ceramium

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    Ceramium

    Taxonomic Hierarchy
    Ceramium
    Kingdom Plantae – Vegetal, plants
    Subkingdom Biliphyta
    Division Rhodophyta – red algae
    Subdivision Rhodophytina
    Class Florideophyceae
    Order Ceramiales
    Family Ceramiaceae
    Genus Ceramium
    Ceramium, Taxonomic Serial No.: 12978

    References and Further Reading

  • A Golden Guide Non-Flowering Plants ©1967
  • Ceramium, Taxonomic Serial No.: 12978
  • Read More »

    Polysiphonia

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    Polysiphonia

    Taxonomic Hierarchy
    Polysiphonia
    Kingdom Plantae – Vegetal, plants
    Subkingdom Biliphyta
    Division Rhodophyta – red algae
    Subdivision Rhodophytina
    Class Florideophyceae
    Order Ceramiales
    Family Rhodomelaceae
    Genus Polysiphonia
    Polysiphonia, Taxonomic Serial No.: 13440

    References and Further Reading

  • Golden Guide Non-Flowering Plants ©1967
  • Polysiphonia, Taxonomic Serial No.: 13440
  • Read More »

    Venus Flytrap or Venus's Flytrap

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    Pronunciation key

    ( vēnəs-iz-flītrap′ )

    Ve•nus Fly•trap

    Also known as Ve•nus’s-fly•trap

    Scientific name: Dionaea muscipula

    n.

    A plant found growing natively in the swampy bogs of North and South Carolina. It may grow between 4 to 14 inches tall and has a white flower and clustered leaves with two-hinged blades which instantaneously shut when triggered by invasive insects.

    Venus Flytrap
    View 750 px Venus Flytrap

    References and Further Reading

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Funk and Wagnalls Standard Dictionary, Comprehensive International Edition, ©1976
  • Venus Flytrap (Extended Article)
  • Read More »

    Padina

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    Padina

    Taxonomic Hierarchy
    padina
    Kingdom Chromista
    Subkingdom Chromista
    Division Phaeophyta – brown algae, algues brunes
    Class Phaeophyceae
    Order Dictyotales
    Family Dictyotaceae J. V. Lamour.
    Genus Padina Adans.
    Padina, Adans., Taxonomic Serial No.: 11184

    References and Further Reading

  • Golden Guide, Non Flowering Plants, Golden Press, ©1967 by Western Publishing Co.
  • Padina sp. at 25 meters depth in channel
  • Marine Plants » Green Algae
  • Algal communities on the atolls
  • Hawaii University, Reef Algae
  • Read More »

    Trypanosoma

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    Pronunciation key

    ( trip′ə-nə-sōma )

    tryp•a•no•so•ma

    n.

    Trypanosoma
    Trypanosoma

    a trypanosome.

    —trip′ə-nə-sōm

    [< Gr. trypanon borer; + some (body)]

    1. a trypanosome.
    2. Any organisms that are classified as single-celled flagellate protozoa that live in the blood of man and other vertebrate animals and lead to serious disease such as the sleeping sickness.
    3. Any microscopic flagellate in the genus Trypanosoma of flagellate infusorians infesting the blood of humans and some other animals. They destroy red corpuscles and lead to serious disease, some fatal, such as the sleeping sickness.
    Taxonomic Hierarchy
    Kingdom Protozoa
    Phylum Sarcomastigophora
    Subphylum Mastigophora – flagellated protozoans
    Class Zoomastigophora
    Order Kinetoplastida
    Suborder Trypanosomatina

    References

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Funk and Wagnalls Standard Dictionary, Comprehensive International Edition, ©1976
  • Trypanosomatina, Taxonomic Serial No.: 43833
  • Read More »

    Protozoa

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    Pronunciation key

    ( prō′tə-zōə )

    Pro•to•zo•a

    n.pl.

    ameba

    Ameoba.

    trypanosome

    Trypanosoma.

    monocystis

    Monocystis.

    stentor

    Stentor.


    One-celled organisms, belonging to this Phylum.

    [Mod.L., pl. of protozoon < Gr. prōtos, first + zōia, pl. of zōion an animal.]

    1. The phylum of protozoans.
    2. Phylum classified in the Kingdom Protozoa, which contains microscopic organisms composed of one cell and reproduce through binary fission. They are typically aquatic and include many parasitic forms.

    Usually protozoans are microscopic, single-cell organisms, which may be colonial or solitary, free-living or parasitic. They are found in both fresh and salt water, damp soil and sometimes in the bodies of plants and animals. Classification is based on structural specialization for locomotion. In the mid 20th century there were about 15,000 known species.

    Among these are the

    • Ameboid Protozoa, (Class Rhizopoda) which move about by the extension of pseudopodia (false feet).
    • Flagellate Protozoa, (Class Flagellata) locomotion by means of a whiplike extension of protoplasm.
    • Spore-forming Protozoa, (Class Sporozoa) parasitic forms lacking organs for locomotion.
    • Ciliate Protozoa, (Class Ciliata), locomotion by means of cilia.

    —pro′to·zoan, adj. & n.

    —pro′to·zoic, adj.

    —pro′to·zoon, n.

    Taxonomic Hierarchy
    Kingdom Protozoa
    Phylum Protozoa
    Direct Children:
    Subphylum Mycetozoa
    Subphylum Sarcodina

    References

  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • The American Peoples Encyclopedia, ©1960
  • Funk and Wagnalls Standard Dictionary, Comprehensive International Edition, ©1976
  • Protozoa Taxonomic Serial No.: 43780
  • Read More »

    Stentor

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    Stentor

    n.

    stentor
    Stentor
    1. Among the ciliate protozoa in the Class Ciliata. Locomotion is achieved through cilia. Some species are ciliated only after division or encystment, others at all times. Reproduction is achieved through conjugation or binary fission. An example is Paramecium caudatum, a unicellular organism found in freshwater ponds.
    Taxonomic Hierarchy
    Kingdom Protozoa
    Phylum Ciliophora
    Class Ciliatea
    Subclass Spirotricha
    Order Oligotrichida
    Family Stentoridae
    Genus Stentor
    Direct Children:
    Species Stentor amethystinus
    Species Stentor coeruleus Ehr.
    Species Stentor igneus Ehr.
    Species Stentor introversus
    Species Stentor mulleri
    Species Stentor multiformis (Mull.)
    Species Stentor niger Mull.
    Species Stentor polymorphus (Mull.)
    Species Stentor pyriformis Johns.
    Species Stentor roeseli Ehr.

    References

  • The American Peoples Encyclopedia, ©1960
  • Stentor, Taxonomic Serial No.: 46596
  • Read More »

    Monocystis

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    Monocystis

    n.

    Monocystis
    Monocystis

    Spore forming Protozoa in the class Sporozoa. These parasitic forms lack organs for locomotion in the adult stage. Reproduction occurs either asexual by formation of spores, or sexual by means of gametes. An example of this is Plasmodium, the causative agent or pathogen of various malarias.

    Taxonomic Hierarchy
    Kingdom Protozoa
    Phylum Protozoa
    Subphylum Mycetozoa
    Superclass Acanthophractida
    Class Sporozoa – parasitic protozoans
    Direct Children:
    Subclass Coccidia
    Subclass Telosporea – amoeba-like protozoans, telesporidian protozoans

    References

  • The American Peoples Encyclopedia, ©1960
  • Sporozoa, Taxonomic Serial No.: 46139
  • Read More »

    Needlepoint Holly ( Ilex cornuta )

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    Needlepoint Holly

    The [ species is a ] 'Needlepoint' holly - a Chinese holly.

    Alan Hight


    New Hanover Cooperative Extension
    Al Hight, Director

     

    Taxonomic Hierarchy
    Needlepoint Holly ( Ilex cornuta )
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Streptophyta – land plants
    Division Tracheophyta – vascular plants, tracheophytes
    Subdivision Spermatophytina – spermatophytes, seed plants
    Infradivision Angiospermae – flowering plants, angiosperms, plantas com flor, angiosperma
    Class Magnoliopsida
    Superorder Asteranae
    Order Aquifoliales
    Family Aquifoliaceae – hollies
    Genus Ilex L. – hollies, holly
    Species Ilex cornuta, Lindl. & Paxton – Chinese holly, horned holly
    Ilex cornuta, Lindl. & Paxton, Taxonomic Serial No.: 503155
    Needlepoint Holly ( Ilex cornuta )
    Needlepoint Holly ( Ilex cornuta )
    Needlepoint Holly ( Ilex cornuta )

     

    References

  • Ilex cornuta, Lindl. & Paxton, Taxonomic Serial No.: 503155
  • 'Needle Point' Holly, Auburn.edu
  • Read More »