What are the plants in the west?

Deciduous tree, up to 14m high, 70cm in diameter at breast height, monoecious, male inflorescence shorter than female inflorescence, found by Prof. Chung Kuan Kwang in 1930 at Mt. The male inflorescence is shorter than the female inflorescence. 1930, Prof. Zhong Guan Guan found it at 240m above sea level in Putuo Mountain, Zhejiang Province, and in 1932, Prof. Zheng Wanjun identified and named it Putuo Goosefoot, and it has not been found elsewhere since then except for only one specimen tree.

The downy soapberry Leguminosae

Deciduous tree, 15-20m high, with thick and branched spines. Leaves even-pinnate, leaflets 10-16 (18). Panicles, sepals, petals with golden yellow tomentum. Pods large, 15-40 cm long, 2.5-4 cm wide, flattened and irregularly twisted, golden-yellow tomentose. It is found in Hengshan, Hunan, on the southeastern slopes of valleys and streamsides at an elevation of about 750 meters. Only two old trees remain.

Guangxi Huotong, now only 3 plants exist Sycamore family deciduous trees, endangered species, endemic to China. The wood grain is straight, the material is flexible and easy to process, does not crack, is the production of furniture, construction, plywood material. Flowers before leaves, flower color is bright and beautiful. Has a high ornamental value, is a good gardening and street trees.

Bysanzu fir, Pinaceae, evergreen tree, 17m high, 80cm in diameter at breast height, branches whorled. The leaves are spirally arranged, linear, with a concave notch at the apex, bright green above and two white stomatal bands below. Endemic to China. It is distributed only in Qinyuan Baishanzu of Jianjiang River, and is born in the forests on the sunny slopes at an altitude of 1700m.

Sheep's-horn maple There are only four deciduous trees of the family Mapleaceae, endangered species, national level 2 protected plants, endemic to China. And produced in Hokkaido, Japan's Japanese maple is very close relatives, the Department of the ancient remnants of the species, has an important scientific value.

Tianmu Ironwood, only 5 plants exist, Birch deciduous tree, endangered species, national level 1 protected plants, endemic species in China. Because of its location in the local rural collective ownership, the habitat is subject to frequent human interference, the situation is dangerous. Tianmu Ironwood: Tianmu Ironwood only. The world's 400,000 species of plants, and now continue to find, in the 1920s, the botanist Mr. Qin Renchang in the Tianmu Mountain collection of plant specimens, found the Qin family of large arborvitae, Mr. Chen Huanyong the first to "Tianmu" named Tianmu Ironwood (ostrya rehderiana chun), the world in the Tianmu Mountain unique. Called "the only child of the earth", true to its name. Tianmu ironwood self-pollination infertile, high requirements for environmental humidity, coupled with the inability to sprout, difficult to renew naturally, Tianmu Mountain, only 5 plants.

Huagai wood now exists only 6 Magnoliaceae evergreen trees, rare species, national level 1 protected plants. Huagai wood is a monotypic genus, only 1, and the adult plants are too rare, although the flowering and fruiting normal, but each fruit mature seeds are very few, in the native mother tree has not been seen around the seedlings, natural renewal ability is very low. Status quo rare species. Huagai wood is currently only found in Yunnan Xichou Fadou. Because of the felling and utilization over the years, there are only 7 large trees left. Because of the fragrant flowers, the pistil group is often bitten by insects when opening, so there are few mature seeds, and even if the seeds are mature, it is not easy to germinate due to the high oil content of the outer seed coat, thus affecting the natural regeneration. If the forests in the area of origin continue to be destroyed or the remaining plants are cut down, there is a danger of extinction. Morphological features Evergreen large trees, up to 40 m tall, up to 1.2 m in diameter at breast height, all parts of the plant glabrous; bark gray-white; current year branches green. Leaves leathery, oblong-obovate or oblong-elliptic, 15-26(-30) centimeters long, 5-8(-9.5) centimeters wide, apex acute, cusp obtuse, base cuneate, dark green above, lateral veins 13-16 pairs; petiole 1.5-2 hundred meters long without stipular scars. Flowers fragrant, tepals fleshy, 9-11, outer whorl of 3 oblong, outside dark red, inside white, 8-10 cm long, inner 2 whorls white, attenuate, base clawed; stamens ca. 65 kernels counted, anthers inwardly longitudinally lobed; gynoecium oblong-ovoid, short-stalked, carpels 13-16, ovules 3-5 per carpel. Aggregate fruit obovoid or ellipsoid, 5-8.5 cm long, 3.5-6.5 cm in diameter, with sparse lenticels. Thickly woody, oblong-ellipsoid or oblong-obovoid, 2.5-5 cm long, apically lobed; seeds 1-3 per interior, exocarp red. Geographic distribution The distribution area is very narrow, only found in two places, Fadou Caoguo Shan He Ma Wan and Nanchang Shan, Xichou County, southeastern Yunnan. It occurs in sunny gullies and moist mountainous areas on upper slopes at 1300-1550 m above sea level. Ecological and biological characteristics Canopus grows in the south subtropical monsoon evergreen broad-leaved forest. The place of origin is warm in summer, no severe cold in winter, four seasons are not obvious, dry and wet seasons are distinct, the average annual temperature of 16-18 ℃, the annual rainfall of 1200-1800 mm, the average annual relative humidity in more than 75%, up to 90% or so; fog period is long, the average annual frost period is only 8. 6 days. The soil is mountain yellow soil or yellow-brown soil developed from sandstone and sand shale, with acidic reaction and pH value of 4.8-5.7. The humus layer of groundcover and dead leaves and branches is as deep as 10-20 centimeters, and the organic matter can reach more than 20%. Huagai wood is an upper tree with a broad crown and a well-developed root system with board roots. It is often associated with Manglietia megaphylla Hu et Cheng, Parakmeria yunnanensis Hu, CORNUS CONTROVERSA Hemsl., Bretschneidera sinensis Hensl., and acid Choerospondias axillaris (Roxb.) Burtt et Hill., Pseudoevodiae-folius Feng, Exbucklandia populnea (R. Br.), Pseudo-Wuzhu Ye Wuga Acanthopanax evodiaefolius var. Br.) Chang, and Sassafras sassafras tzumu (Hemsl.) Hemsl. are mixed into forests. The Chinese gourami blooms and fruits less, once every 1-2 years, with few flowering branches and low fruiting rate. The flowering period is in late April, and the fruiting period is in September-November.

Conservation value Canopus is a monospecific genus endemic to China. It is a primitive taxon in Magnolieae, a subfamily of Magnolia, and is of academic value for the study of Magnoliaceae's classification system and paleobotanical system. The tree trunk is straight, the wood structure is meticulous, with silky luster, rot-resistant, insect-resistant, and is a rare timber tree species in Yunnan Leyuan. The flowers are colorful and fragrant, and can be used as ornamental trees in the garden.

The Dianthus is now only 6 plants linden family evergreen tree, endangered species, the national level 2 protected plants. For China's southwest endemic species, but also the Dianthus genus of this oligo-species genus of one of the main species, in the zonal geographic research and selection of precious tree species have important value in the application.

Knee shank wood now only exists 10 Wesleyan semi-evergreen trees, endangered species, the national level 1 protected plants. Our country only this kind. The knee shank wood found in southwestern Guangxi is the northernmost species of the genus. It has important scientific value for the study of China's seed plant phylogeography and its tropical relatives. Semi-evergreen tree, 13 meters high, 60 centimeters in diameter at breast height. Bark yellow-brown, with well-developed plate-like roots. Leaves are thinly leathery, oblong or oblong-lanceolate, 9-17 cm long, with dense lattice-like vein lines. Racemes born in the leaf axils of branch tips, 2-3 cm long, flowers pale white, petals 5-merous, oblong inserted on the periphery of the disk; 5 stamens; ovary globose, with a tuft of long hairs at the tip. Capsule oblong-ovoid, 2.5-2.8 cm long. Seed 1, ca. 2 cm, testa black-brown glossy, aril fleshy, all or nearly all enveloping the seed, yellow-brown. A tropical tree species discovered in recent years. It grows on hilly slopes not far from the coast at an elevation of about 50 meters. The main plants associated with it are leopard skin camphor, gurgling wood ginger, red branch thin peach and mountain small orange. The root of the plate exposed to the ground, can sprout new plants. Distributed only in Guangxi Hepu, the origin only found a large tree, rarely flowering and fruiting, the forest did not see young trees. It is also the northernmost distribution of the genus, which is of great scientific significance to the study of Chinese flora.