Taxus is an evergreen tree with a height of 30m and a trunk diameter of1m.. The leaves alternate spirally, the base is twisted into two rows, the cords are slightly curved, the length is 1-2.5cm, the width is 2-2.5mm, the leaf margin is slightly curved, the tip is gradually pointed, there are two wide yellow-green or gray-green stomatal zones on the back of the leaves, the midvein is densely protuberant, and the green zone on the leaf margin is extremely narrow, which is dioecious. Male flowers are solitary in leaf axils, and female flowers are dioecious. The seed is oblate with 2 edges, the seed is ovoid, and the aril is cup-shaped and red.
And the categories are divided.
1. Taxus cuspidata is not only a rare medicinal plant, but also a good product for gardens, courtyard greening and beautification. It is the most precious and rare advanced greening tree species at present. The unique ornamental value of bonsai is another major feature of Taxus cuspidata. The bonsai of Taxus cuspidata treated by dwarfing technology is simple and elegant in shape, with compact but not dense branches and leaves, stretching but not loose. Red stems, red branches, green leaves and red beans make them have multiple ornamental values of ornamental stems, branches, leaves and fruits. Smooth red stems represent magnanimity and nobility, evergreen needles express perseverance and eternity, and red beans shaped like "acacia beans" show love and yearning. The whole plant is exquisitely sculpted, extraordinary and free from vulgarity, and has a strong flavor of life and cultural heritage. Taxus cuspidata resources are scarce, and it is listed as a national first-class rare protected tree species.
2. Taxus yunnanensis is mainly distributed in 16 counties in western Yunnan and Dizhou, with a total area of about 90,000 square axioms. It is characterized by wide distribution, scattered growth, no pure forest and scattered trees in the forest.
3. Tamarix 3.IUCC is mainly distributed in northwest Yunnan, southern Tibet and southwest China.
4. Taxus China (. Penaeus China
5. Taxus mairei is mainly distributed in pure forests in eastern Yunnan, southwestern Yunnan and eastern Yunnan, and most of the rest are scattered trees.
6. Taxus media is a hybrid introduced to China at the end of 20th century. Its female parent is Taxus cuspidata and its male parent is Taxus barkeri. It has only 80 years of history in the United States and Canada. Taxus media is mostly shrub type, because it can only grow into shrubs, but not trees, so it is a good variety for greening.
On a global scale, although yew is distributed in the United States, Canada, France, India, Myanmar and China, yew in Asia has the largest reserves. Among them, China's yew reserves account for more than half of the global reserves, and among the 1 1 varieties, there are five in China.