ginkgo

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ginkgo

(gĭng`kō) or

maidenhair tree,

tall, slender, picturesque deciduous tree (Ginkgo biloba) with fan-shaped leaves. The ginkgo is native to E China, where it was revered by Buddhist monks and planted near temples. A "living fossil," the ginkgo is the only remaining species of a large order (Ginkgoales) of gymnosperms that existed in the Triassic period. Its form has not changed in millions of years, as is shown by fossils widely scattered over Europe, North and South America, and Asia. The ginkgo is valued today as a street tree, being exceptionally tolerant of smoke, low temperatures, and minimal water supply. The male and female strobile (see conecone
or strobilus
, in botany, reproductive organ of the gymnosperms (the conifers, cycads, and ginkgoes). Like the flower in the angiosperms (flowering plants), the cone is actually a highly modified branch; unlike the flower, it does not have sepals or petals.
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) are borne on separate trees. The "fruit," botanically a seed, is surrounded by a malodorous pulp, making the male trees more desirable as ornamentals; however, the seed kernel is highly esteemed in East Asia as a food. The herbal remedy ginkgo biloba, an extract of ginkgo leaves, is said to enhance concentration and short-term memory. The ginkgo is classified in the division PinophytaPinophyta
, division of the plant kingdom consisting of those organisms commonly called gymnosperms. The gymnosperms, a group that includes the pine, have stems, roots and leaves, and vascular, or conducting, tissue (xylem and phloem).
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, class Ginkgoopsida, order Ginkgoales, family Ginkgoaceae.

Ginkgo

 

a deciduous gymnospermous tree of the order Ginkgo. The only modern representative is the Ginkgobiloba. Height, 30-40 m; trunk diameter, 1 m. The tree has a branchy crown and is dioecious. Its leaf has a petiole and is fan-shaped. The seeds are ellipsoid, 2-3 cm long, with fleshy outer shells. The ginkgo is found in a few regions of East Asia. In Europe ginkgos have been grown as decorative trees since 1754. In the USSR, they winter well on the Black Sea coasts of the Caucasus and Ukraine.

ginkgo

[′giŋ·kō]
(botany)
A dioecious tree, commonly known as the maidenhair tree (Ginkgo biloba), that is native to China and is cultivated as a shade tree, it is the only surviving species of the class Ginkgoatae and is considered a living fossil. Also known as gingko tree.
References in periodicals archive ?
Protective effects of Ginkgo biloba extract on the lung injury of dogs undergoing hypothermic cardiopulmonary bypass.
For the ceremony, Feeney's Nursery had donated a young ginkgo tree and two workers, who trimmed burlap from its base and readied the soil.
Only in the cycads and in Ginkgo do the relic motile sperm swim to the region of fertilization.
Specifically, this installment focuses on the intriguing possibility that two widely consumed and presumably safe medications--the herbal supplement ginkgo biloba and the cholesterol-lowering drug Lipitor--may minimize neurological damage after injury.
GINKGO {GINK-go} Linnaeus 1771 * Maidenhair Tree * [Chinese yin, silver, and hing, apricot, in reference to the appearance of the seed which has an outer fleshy coat and a hard silver-colored inner coat.
Bayer and Ginkgo Bioworks will create a new company focused on the plant microbiome.
In hundreds of thousands of acres, we have planted goldenraintrees, ginkgos, and dawn redwoods from China instead of one of our beautiful native oaks, and in doing so we have lost the chance to grow and support 534 species of carterpillars, all of them nutritious bird food.
But once upon a time, in the Jurassic period of the Mesozoic era, the climate was wet and warm; ferns, sequoias, pines and ginkgos flourished along the shoreline of a large, shallow lake.
Ginkgos are especially beautiful in late fall when leaves turn golden.
Contractor address : Parc D~activits Du Chne Activillage 8 Alle Des Ginkgos 69673 Bron
China has some ancient ginkgos, including one thought to be 3,500 years old.
Ginkgos and multituberculates: Evolutionary interactions in the Tertiary.