What plants are there in the west?

Deciduous trees, up to 14m, DBH 70cm. Monoecious. The male inflorescence is shorter than the female inflorescence. Professor Zhong Guangguang discovered it at 240m above sea level in Putuo Mountain, Zhejiang Province on 1930, and Professor Zheng identified it on 1932 and named it Putuo gooseberry. Except for a specimen tree, it has not been found anywhere since then.

Gleditsia sinensis of Leguminosae

Deciduous trees, 15-20m high. Having thick and branched spines. Even pinnate compound leaves, leaflets 10- 16( 18). Panicle, sepals, petals with golden fluff. The pod is large, with a length of 15-40cm and a width of 2.5-4cm. It is flat and irregularly wrapped with golden fluff. Distributed in Hengshan Mountain, Hunan Province, it was born on the southeast slope and stream side of the valley at an altitude of about 750m m. At present, there are only two ancient trees left.

There are only three species of deciduous trees of Indus family in Guangxi, which are endangered species and endemic to China. The wood grain is straight, elastic, easy to process and does not crack. It is the best material for making furniture, buildings and plywood. There are flowers first, then leaves, and the colors are bright and beautiful. With high ornamental value, it is a good product for landscaping and street trees.

Baishanzu Abies Pinaceae evergreen tree, height17m, DBH 80cm. The branches are spinning. The leaves are spirally arranged, linear, concave at the top, bright green at the top and two white stomata at the bottom. Unique to China. It is only distributed in baishanzu, Qingyuan, Jianjiang, and is born in the sunny forest at an altitude of1700 m.

There are only four species of deciduous trees of Aceraceae in Aceraceae, which are endangered species, national second-class protected plants and endemic to China. It is closely related to Acer from Hokkaido, Japan, and is an ancient remnant species with important scientific value.

There are only 5 species of deciduous trees in betulaceae, which are endangered species, protected at the national 1 level and endemic to China. Because its location is owned by the local rural collective, its habitat is often disturbed by human activities and is in danger. Temujin Tianmu: Temujin Tianmu's only son. There are 400,000 kinds of plants in the world, and they are still being discovered. In the 1920s, Mr. Qin Renchang, a botanist, discovered the trees of Qin Keda when collecting plant specimens in Tianmu Mountain. Mr. Chen Huanyong was the first to be named ostrya rehderiana chun after Tianmu, which is unique in the world. Known as the "only son of the earth", it is worthy of the name. Temujin is self-pollinated and sterile, which requires high environmental humidity. In addition, it is difficult to germinate and regenerate naturally. There are only five plants left in Tianmu Mountain.

There are only 6 species of magnolia evergreen trees, rare species and national 1 class protected plants. The haplotype genus is only 1 plant, and there are too few adult plants. Although the flowers and fruits are normal, there are few mature seeds in each fruit, and no seedlings are seen around the original mother tree, so the natural regeneration ability is very low. Rare species at present. Huagaimu is currently only found in Fadou, Xichou, Yunnan. Due to years of logging and utilization, there are only seven big trees left. Because the flowers are fragrant and the pistils are often bitten by insects when they are open, there are few mature seeds. Even if the seed is mature, it is not easy to germinate because of the high oil content in the seed coat, which affects natural regeneration. If we continue to destroy the forests in the producing areas or cut down the remaining plants, we will be in danger of extinction. Morphological characteristics of evergreen trees, up to 40 meters, DBH is 65438 0.2 meters, all parts of the whole plant are hairless; Bark is grayish white; Green branches were born that year. Leaves leathery, oblong obovate or oblong ovoid, length 15-26(-30) cm, width 5-8(-9.5) cm, acute apex, blunt apex, wedge-shaped base, dark green top, lateral veins 13- 16 pairs; Petiole length1.5-200m, without stipules. The flowers are fragrant, the perianth segments are fleshy, 9- 1 1, the outer segment is oblong, the outer surface is crimson, the inner surface is white, the length is 8- 10 cm, and the inner two segments are white, gradually narrowing, with claws at the base; There are about 65 stamens, and the anthers divide longitudinally inward; The gynoecium is ovoid with short stalk, with 13- 16 carpels, and each carpel has 3-5 ovules. Aggregate fruit is obovoid or oval, with a length of 5-8.5 cm and a diameter of 3.5-6.5 cm, with sparse lenticels. The wood is thick, oblong-ovoid or oblong-obovate, 2.5-5cm long, with a shallow crack at the top; Each seed 1-3, exocarp red. Geographical distribution is extremely narrow, only found in Mawan and Nanchang Mountain of Fadou Cao State in Xichou County, southeast Yunnan. Born in the wet mountain of Yanggu at the top of the hillside at an altitude of1300-1550m. Eco-biological characteristics: Cephalotaxus China grows in subtropical monsoon evergreen broad-leaved forest. The place of origin is warm in summer, without severe cold in winter, the four seasons are not obvious, and the dry and wet seasons are distinct. The annual average temperature is 16- 18℃, the annual rainfall is 1200- 1800 mm, the annual average relative humidity is above 75%, and the maximum relative humidity is about 90%. The fog period is long, and the average annual frost period is only 8. Six days. The soil is mountain yellow soil or yellow brown soil developed from sandstone and sand shale, which is acidic and has a pH value of 4.8-5.7. The humus layer of ground cover and litter is as deep as 10-20cm, and the organic matter can reach more than 20%. Huagaimu is an upper-layer tree with a broad crown, developed roots and developed roots. Often used with Manglietia macrophylla, Manglietia yunnanensis, Manglietia yunnanensis and Cornus officinalis. China Bole Tree. Choerospondias axillaris (roxb. ) Burt et al. Hill. Evodia rutaecarpa var. Acanthopanax. Poplar water chestnut, water chestnut, sassafras) Hemsl. And other mixed forests. China Cephalotaxus grandis has few flowers and fruits. It blooms once every 1-2 years, with few branches and low seed setting rate. The flowering period is in late April, and the fruiting period is 9-165438+1October.

The protective value of Taoerqi is a single genus plant endemic to China. It is the original group of Magnoliaceae plants in Magnoliaceae, and has academic value for the study of Magnoliaceae classification system and ancient flora. The trunk is tall and straight, the wood structure is meticulous, the luster is silky, it is corrosion-resistant and insect-resistant, and it is a rare timber tree species in southern Yunnan. Colorful and fragrant, it can be used as a garden ornamental tree species.

There are only 6 species of large evergreen trees of Tilia amurensis, which are endangered species and national second-class protected plants. Endemic to southwest China, it is also one of the main rare tree species of Aegiceras, which is of great value in floristic geography research and breeding of rare tree species.

There are only 10 semi-evergreen trees in Celastraceae, which belong to endangered species and are protected by the state 1 class. This is the only one in our country. The kneecap found in southwest Guangxi is the northernmost species of this genus. It is of great scientific value to study the floristic geography of seed plants and their tropical relatives in China. Semi-evergreen trees, elevation13m, DBH 60cm. Bark is yellow-brown with well-developed flat roots. The leaves are thin leathery, oblong or oblong-lanceolate, 9 ~ 17 cm long, and the veins are densely latticed. Racemes are born in the axils of branches and leaves, 2 ~ 3 cm long, with pale white flowers, 5 petals, oblong, and inserted at the periphery of the disk; 5 stamens; The ovary is spherical with a tuft of long hair at the top. Capsule is ovoid, 2.5 ~ 2.8 cm long. The seed has 1 seed and is about 2 cm long. The seed coat is dark brown and shiny, and the aril is fleshy, completely or almost completely covered by seeds, and yellow-brown. Tropical tree species discovered in recent years. It grows on a hilly slope about 50 meters above sea level not far from the coast. The main plants associated with it are Cinnamomum camphora, Litsea cubeba, red-branch thin peach and small orange. New plants can sprout from the roots of exposed boards. Only distributed in Hepu, Guangxi, only one big tree was found in the producing area, with few flowers and fruits, and no young trees were found under the forest. It is also the northernmost part of the genus, which is of great scientific significance to the study of China flora.