Pleurospermum pilosum C. B. Clarke ex H. Wolff

This species has reputed medicinal use.

Plants 20–40 cm, white-setose throughout. Root stout and branched. Stem ribbed, lower parts purple-red. Stem leaves petiolate, petioles ca. 10 cm; sheaths broadly ovate, 2.5–4 cm, purple-red adaxially, densely white-setose abaxially; blades triangular-oblong, 10–15 × 5–7 cm, 3-pinnate; pinnae 5–7 pairs, only basal pinnae short-petiolulate; ultimate segments obovate or oblanceolate, 3–5 × 2–3 mm, setose along nerves abaxially, entire or 2–3 toothed, cuspidate at apex. Umbels 3–15(–20) cm across (in fruit); bracts 1–3, 1–3 cm, white-setose abaxially, apex acute or pinnate; rays 6–17, 8–10 cm; bracteoles 8–10, broadly cuneate-obovate, 6–15 mm, mottled purple-green, pubescent along nerves, abruptly acuminate to a short point; umbellules many-flowered. Calyx teeth obsolete. Petals obcordate, white, often purplish on reverse, ca. 2 × 1.2 mm. Fruit oblong, 3–6 × 1.5–2 mm; ribs narrowly winged; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Oct, fr. Sep–Nov.

S Xizang (Yadong) [Bhutan, Sikkim].

Damp meadows, streamsides; ca. 4100 m.

Pleurospermum pilosum là một loài thực vật có hoa trong họ Hoa tán. Loài này được C.B. Clarke ex H. Wolff miêu tả khoa học đầu tiên năm 1929.

疏毛棱子芹（学名：Pleurospermum pilosum）为伞形科棱子芹属的植物，为中国的特有植物。分布在中国大陆的西藏等地，生长于海拔4,100米的地区，常生于山谷草地，目前尚未由人工引种栽培。