雅江棱子芹 ya jiang leng zi qin

Trachydium astrantioideum H. de Boissieu, Bull. Soc. Bot. France 53: 422. 1906; Hymenidium astrantioideum (H. de Boissieu) Pimenov & Kljuykov.

Plants dwarf, 8–20 cm, often tinged purple-red. Root gray-brown, conic, 1–1.5 cm thick. Stem strongly reduced, 3–5 cm. Petioles short, flattened, winged, 3–5 cm, sheaths oblong; blades ovate-lanceolate, 4–6 × 1.5–2.5 cm, 3–4-pinnate; pinnae 5 pairs, petiolulate; ultimate segments linear-lanceolate, 1–2.5 × 0.5–1.5 mm, midrib channelled. Umbels usually almost sessile (sometimes pedunculate in mesic conditions), 15–18 cm across; bracts few, leaf-like; rays stout, 15–25, 3–15 cm, very unequal, ribbed; bracteoles 12–14, obovate, 5–12 mm, just longer than flowers, apex pinnate, pedicels numerous, 0.5–1 cm, narrowly winged/ribbed. Calyx teeth minute, ca. 0.2 mm, ovate. Petals oblanceolate, white or greenish-white. Stylopodium short-conic, dark purple. Fruit broadly ovoid, 3.5–6 × 3–5 mm, pale brown, tuberculate; ribs all broadly triangular-dentate-winged; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Aug, fr. Sep–Oct.

Alpine grasslands; 4000–4600 m. SW Sichuan.