Huangguniang is a perennial herb with creeping roots at the base. The stem is about 40-80 cm high, the base is slightly woody, the branches are sparse or unbranched, the stem nodes are not very swollen, often pilose, and the tender parts are dense. Long oval, sometimes rhombic oval, tapering at the top and asymmetrical narrow wedge at the bottom.
Pedicel is 6- 16 mm long, erect at flowering stage, recurved later, and densely pilose in fruit. Calyx is wide bell-shaped, about 6 mm long, densely pilose, with triangular calyx teeth and bristles at the edge;
Corolla radial, white, diameter 15-20 mm, lobes flat, wide and short, the top suddenly narrowed into a triangular tip, with pubescence outside and hairy edges; Stamens and styles are shorter than corollas.
Extended data:
cultivation techniques
Seed propagation: mature seeds are collected in September-65438+10, and seed propagation is generally not adopted. The disadvantage is that it can't blossom and bear fruit in that year, which is labor-consuming, time-consuming and laborious. ?
Rootstock propagation: from April 10, in spring, plow the ground, pick out the roots, cut the roots into sections with 2 ~ 3 axillary buds, and bury the cut roots in the ground with a distance of 30cm and a ridge length of 66.7cm, with double rows on the ridge.
Field management: weeding can be closed at seedling stage without causing phytotoxicity to itself; Although there are few pests, they also occur, and corresponding pesticides can be sprayed; Leaf spot occurs occasionally, and spraying foliar fertilizer has a good preventive effect; The flowering period can last about one month in July 10.