细茎阿魏 xi jing a wei

Peucedanum gracile Ledebour, Fl. Altaic. 1: 308. 1829.

Plants 50–80 cm, sparsely pubescent. Stem slender, erect, solitary, paniculate-branched from middle, branches alternate. Basal leaves short-petiolate; blade broadly ovate, ternate-2–3-pinnatisect; ultimate segments ovate or oblong-elliptic, pinnatifid, lobules lanceolate, ca. 5–10 mm, adaxially glabrous, abaxially sparsely pubescent, thin-papery. Cauline leaves reduced upwards, uppermost leaves bladeless, sheaths lanceolate, deciduous. Terminal umbel pedunculate or subsessile, lateral umbels 1–2, pedunculate, usually slightly shorter than terminal; bracts absent; rays 4–8, unequal; bracteoles lanceolate, membranous, deciduous; umbellules 10–15-flowered. Stylopodium low-conic, base dilated; styles elongate. Fruit ellipsoid, 5–7 mm; vittae 1 in each furrow, 2 on commissure. Fl. Jun, fr. Jul.

Grassy places, gravelly slopes on valley sides; 730–1700 m. N Xinjiang (Altay) [Russia (W Siberia)].