Douliou is a national second-class protected plant.

Douglou is the collective name for plants of the genus Chonglou in the family of Yelinophyceae, which is a perennial herb with rhizomes that walk horizontally, are yellow-brown, plump, ringed, and have fibrous roots. The stem is erect, solitary, cylindrical, glossy, slightly purplish red, with a membranous leaf sheath surrounding the base. Leaves whorled, usually umbrella-shaped aggregated at the top of the stem, shortly stalked, leaf blade oblong or oblong-lanceolate, apex acuminate, base day amount, part cherry-shaped, entire, green on both sides.

Flowers solitary at the top of the stem, pedicel white horse bone purple-red; outer column green, leaf-like, long ovate, long amount of days, apex acuminate; inner column yellowish-green, the same number as the outer, linear, shorter than the outer column; anthers linear, golden-yellow, the rule of small kid's room superior. Aster fruit suborbicular, green, mature yellow-brown, dehiscent. Seeds many cold-water seed, ovate, bright red. Flowering summer, fruiting fall and winter.

The origin of Chonglou and other introductions

Chonglou is distributed in Fujian, Hubei, Hunan, Guangxi, Sichuan, Guizhou and Yunnan, etc. It is born in shady and moist places under the forests in mountainous areas or grassy places on roadsides. Chonglou is a shade plant, adapted to oblique light or diffused light, moisture moderate environment, both afraid of dry early and afraid of accumulation. Yunnan side is basically the growth of Dian Chonglou, in Jiangxi side is basically Hua Chonglou, it is very much more varieties, whether it is Dian Chonglou or Hua Chonglou, it in November 10, 2021 are included in the national second-class protection of wild plants.

Douglou can be used as medicine, bitter flavor, sex slightly cold, there is a small poison. A flower emerges from a circle of whorled leaves, and the flower shape is extremely similar to a seed, which is very rare and has a high ornamental value. In terms of economic value, Chonglou is an important raw material for a variety of proprietary Chinese medicines, mainly rhizome-based herbs.