细叶芹 xi ye qin

Anthriscus boissieui H. Léveillé; Charophyllum reflexum Aitchison.

Plants annual, 70–120 cm high. Root fusiform. Lower leaves long-petiolate; petiole 2.5–7 cm, sheath pubescent; blade broadly ovate in outline, 10–20 × 5–10 cm, 3-ternate-pinnate; primary pinnae 5–6 pairs, broadly deltoid-lanceolate, 2.5–7 × 1.5–4 cm; ultimate segments ovate, small; both surfaces hispid or adaxial surface glabrous, finely serrate. Umbels to 6 cm wide; rays 2–5, 1.5–4 cm; bracteoles 2–6, linear, 1.5–4 × 1–1.5 mm, midrib conspicuous, margins ciliate. Umbellules 9–13-flowered, to 2 cm wide; staminate flowers 4–8 per umbellule, bisexual flowers 3–7 in each umbellule. Pedicels 1–2 mm, extending to 3–6 mm in fruit. Petals white, pale yellow or pale bluish purple, obovate. Style shorter than stylopodium. Fruit 7–9 × 1.5–2.5 mm, apex acuminate and beaked; ribs broad. Fl. and fr. Jul–Aug.

Forests, open grassy places, roadsides; 2100–2800 m. SW Sichuan, S Xizang, NW Yunnan [Afghanistan, Bhutan, N India, Kashmir, Nepal, Pakistan].