Lagerstroemia yunnanensis

Lagerstroemia indica, Lagerstroemia yunnanensis.

Family name: Lychnaceae

Protection grade: Ⅲ

Status: Endangered species. Lagerstroemia yunnanensis is distributed sporadically in southern Yunnan. Because it is an excellent firewood tree species, it is often cut down for fuel in the local area, and the forest is seriously damaged and the natural regeneration is not good, so the distribution range is getting smaller and smaller. The number of plants is decreasing day by day.

Protective measures: As the distribution area of Lagerstroemia indica in Yunnan is not in the nature reserve, there are no protective measures at present. It is suggested that the concentrated distribution area should be designated as natural protection points to facilitate the preservation of germplasm resources.

Evergreen trees, 6-8 meters high; Branches are cylindrical with shorter internodes. Leaves nearly opposite, upper leaves of branchlets alternate, hard paper or thin leathery, oval or wide oval, 8- 17 cm long and 4.5-7 cm wide, base obtuse or narrowly wedge-shaped, glabrous on both sides, and 7-9 pairs of lateral veins are obvious; Petiole length 1- 1.5 cm. Panicle terminal, 8- 17 cm long; Pedicel is short tomentose, about 65438 02 cm long; The flowers are blue-purple, the calyx tube is about 14 mm long, densely covered with yellow-brown short fluff, and the lobes are wide and triangular, which is extremely developed. After ripening, the inside is lignified, hard and hairless, and it is 1/2 or the same length as calyx tube. 6 petals, nearly round or oblong, about 20 mm long, with shallow wavy edges, slightly concave top and claws; Stamens about 130, inserted in the middle and lower part of calyx tube, arranged in 2-3 rows; Ovary 6-loculed, glabrous, style longer than stamens. Capsule oblong, 6-valved, surrounded by persistent calyx at base; The seeds are mostly yellow-brown, with wings at the top and a length of 1- 1.5 cm. The flowering period is from May to June, and the fruiting period is10-65438+February.

The distribution area is the tropical and subtropical mountainous area in southern Yunnan, and the climate is characterized by high temperature and dryness in March-May, high temperature and rain in June-10, and cool and foggy in June-1-February. The soil is latosol The plant likes sunshine, is drought-tolerant, has developed roots, a wide crown and large and beautiful flowers. Although it has strong fruiting ability, its natural regeneration is poor and there are few young trees under the forest. Mixed in the Woods.

Distribution: Yunnan

Propagation mode: seed propagation, seedling digging, transplanting or cutting propagation.

Conservation value: Lagerstroemia yunnanensis is endemic to China. It is distributed sporadically in some parts of southern Yunnan, China, and its quantity is rare, which has certain economic value and should be protected.