What are the characteristics of the latest ginkgo trees?

Ginkgo tree, also known as ginkgo tree, grows slowly and has a long life span. It takes more than 20 years from planting to bearing fruit under natural conditions, and it can bear a large number of fruits after 40 years. Therefore, it is alias "Gongsun tree", which has the meaning of "male seed and grandson eating". It is the old longevity star in the tree. Ginkgo tree has appreciation, economic, medicinal value, the whole body is "treasure." Ginkgo tree is the oldest gymnosperms left after the Quaternary glacial movement. It is one of the most precious tree species in the world. Therefore, it is regarded as a "living fossil" in the plant world. The following small series will introduce the characteristics of Ginkgo tree.

General characteristics of Ginkgo biloba

1, leaves: fan, stipe, long branches of the leaves are mostly 2-lobed, short branches of the leaves often have wavy notch.

2. Sporophyllome: unisexual, heterophyletic.

3. Microspore ball: catkin, born in the axil of scale at the top of short branch. The microsporophylls have short stipes, and the stipe ends often have two pendent microsporangia.

4. Microspore: oblong, with a concave distal groove on the longitudinal axis and fine protrusions on the outer wall.

5. Megasporophyllous bulb: simple, usually with a long stalk, with two annular megasporophyllous leaves at the end of the stalk, especially called the collar, each bearing an orthospore.

6. Seeds: Seeds subspherical, seed coat differentiated into 3 layers. Embryo with 2 cotyledons, chromosome: x=12.

Original Characteristics of Ginkgo Tree

Ginkgo has many of the more primitive features. Its veins are in the form of "bifurcated veins," unique in gymnosperms, but common in ferns. Its male pollen germinates to produce only two ciliated swimming sperm. This trait is found only in cycads in gymnosperms and is common in ferns. This shows that Ginkgo biloba is a more ancient plant than pine, fir, cypress and other trees. So botany will be classified as a class, an order, a family, a genus, a species.

Distinguishing Characteristics of Ginkgo biloba

Deciduous trees, leaves fan-shaped, scattered on long branches and clustered on short branches. Flowers unisexual, dioecious. Seeds drupaceous.

Morphological characteristics of Ginkgo biloba

For deciduous large trees, DBH up to 4 meters, young tree bark nearly smooth, light gray, gray tree skin, irregular longitudinal crack, long branches and slow growth of spurs. Leaves alternate, scattered radially on long branches, 3 - 5 clustered on short branches, slender petioles, flabellate, pale green on both surfaces, more or less notched or 2-lobed at broad apical margin, 5 - 8 (~15) cm wide, with numerous forked veinlets. dioecious, rarely monoecious, cones solitary in axils of short branches; male cones catkin like, stamens numerous, each with 2 anthers; female cones long pedunculated, pedicel tips often bifurcated (rarely 3 - 5 furcate), fork ends bearing 1 ovule with discoid receptacle, often 1 ovule develops into a developing seed.

Seeds drupelike, long pedunculate, pendulous, elliptic, oblong-obovate, ovoid, or subglobose, 2.5 - 3.5 cm long, 1.5 - 2 cm in diam.; aril fleshy, powdery, yellowish or orange-yellow when mature; testa bony, white, often with 2 (sparse 3) longitudinal ribs; endocarp membranous

Summary: Ginkgo trees tall and straight, leaves like fan. The crown is large and shady, with cooling effect. Quintessential leaves, long life. No pests, no pollution environment, clean trunk, is a well-known pollution-free tree species, conducive to the propagation of Ginkgo biloba and add scenery. Adaptability is strong, ginkgo to climate soil requirement is very wide range. Anti-smoke, anti-fire, anti-toxic gas. Ginkgo tree tall, straight trunk, beautiful posture, spring and summer green, late autumn golden, is the ideal landscaping, sidewalk species. Can be used for landscaping, sidewalk, highway, field forest nets, windbreak forest belt ideal cultivation tree species. It is listed as one of the four long-lived ornamental tree species in China (pine, cypress, locust tree and ginkgo).