Also
known as Maidenhair Tree, it is a member of the Ginkgoaceae Family, with the
Latin name of Ginkgo biloba.
The
deciduous mega- arbor can attain the
height up to 40 meters with a chest diameter of 4 meters. Its taupe bark has
irregular longitudinal dehiscence. The inter-growing leaves are sparsely arrayed
on long branches spokewisely, while every 3 to 5 of them cluster together on
short braches. The light green leaf looks like a fan. It's dioecious, but
monoecious ones are sometimes found. It bears globular flowers. The female cone
bears a long peduncle. The ovoid or sub-sphaeroidal seeds are 2.5 to 3.5
centimeters long, with a diameter of 1.5 to 2 centimeters. The seeds bear fleshy
aril covered by whitening and turn straw yellow or orange when
ripened.
It prefers subtropical monsoon
region with favorable hydrothermal condition. The pH value of the yellow earth
or yellow brown earth there is 5 to 6. It usually blossoms in the first twenty
days of April. The seeds ripen from the last ten days of September to the first
ten days of October. The defoliation lasts from the last ten days of October to
November. It enjoys a long life. In China there are 3,000-year-old or older
gingkoes in existence. The female
plant usually fructifies at the age of 20 or so. Even the 500-year-old trees are
still able to fructify regularly.
It's
the only species of the Ginkgoaceae
Family in existence at present, and is
labeled as "giant panda" and "living fossil" of the plant kingdom. The wild
ginkgo is only found sparsely distributed in broadleaf forests and valleys 300
to 1,100 meters above sea level on Tianmu Mountain, Zhejiang Province. It's
also a rare timber wood and can be used for ornamental purposes. Its seeds and
leaves can also be made into medicines.