Ginkgo bears fruit every year. Here in Shandong, at the end of March every year, the leaves of ginkgo trees begin to sprout. When they germinate, the pollen of ginkgo biloba has begun to stir. In about 20 days, by the end of April, Ginkgo biloba leaves had grown up and ginkgo nuts began to sprout, like a long matchstick, taking shape. In the autumn of 10, ginkgo fruit is basically mature and can be picked. Other places, such as Guangxi and Yunnan in the south and Heilongjiang in the north, have certain differences in flowering and fruiting due to different climates.
Ginkgo biloba, a deciduous tree of ginkgo biloba. Ginkgo biloba, which appeared hundreds of millions of years ago, is the oldest relic of gymnosperms left over from the Quaternary glacial movement. Now, ginkgo biloba is very rare, and there are few trees that have been around for hundreds of years. Other plants in the same class are extinct, so Ginkgo biloba has the reputation of living fossil.
It blooms in April and matures in June, 5438+ 10. Seeds are long-handled, pendulous, often oval, obovate, ovoid or nearly spherical, 2.5~3.5 cm long and 2 cm in diameter. The aril is bony and white, and usually has 2 (sparse 3) longitudinal edges. Endosperm membranous.
Seed coat is fleshy, covered with white powder, exocarp is fleshy, yellow or orange when mature, covered with white powder, and leaves have a bad smell; The middle part is white bone with 2~3 longitudinal ridges; Endophytic membrane, reddish brown; Endosperm is fleshy and slightly bitter; There are 2 cotyledons and 3 rare ones, which were not unearthed at the time of germination. The primary leaves are 2-5, strip-shaped, about 5 mm long and 2 mm wide, and the apex is slightly concave. After the 4th or 5th blade, the blade is fan-shaped, with deeply split apex and irregular notch. The petiole is 0.9-2.5 cm long. There is a main root.
References:
Baidu Encyclopedia Entry Ginkgo Tree