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(save famine materia medica)

[synonym] zhenzhuhua (rescue grass) and shuangbutterfly (Tianmu yam flora of Zhejiang Province).

[source] it is the fruit or root of Polygonum cuspidatum.

[plant morphology] Xinggu oil

Deciduous shrub, up to 3 m high. Compound leaves opposite; petiole 3-8 cm long, with early falling stipules; 3 leaflets, elliptic or elliptic ovate, 13-7 cm long, 1-3 cm wide, apex acuminate, base cuneate, margin serrulate, with small tip, sparsely fine hairs on veins on both sides; petiole very short. Panicle terminal; calyx 5, yellow white; petals 5, ca. as long as sepals, white; stamens 5; carpels 2, ovary hirsute, style 2. Capsule flat, inverted triangular, ca. 2 cm long, pericarp membranous, striate. Seeds round and flat, yellow and shiny. The flowering period is June. The fruit period is from July to September.

It grows on the side of a hillside or in the thickets on both sides of a valley. It is distributed in most parts of the country.

[chemical constituents] fresh leaves contain Eupatorin.

[functions and indications] records of Zhejiang TIANRI yam planting: "for dry cough, the fruit is three to four coins, fried in water. For women with postpartum blood stasis, take three Liang fresh roots, five yuan safflower, one or two Rubia, fried in water, brown sugar and yellow rice wine, once in the morning and once before dinner. "