紫色棱子芹 zi se leng zi qin

Hymenidium apiolens (C. B. Clarke) Pimenov & Kljuykov; Pleurospermum apiolens var. nipaulense Farille & S. B. Malla; P. atropurpureum K. T. Fu & Y. C. Ho.

Plants 30–40 cm. Stem ribbed, branched, lower parts dark purple-red. Basal and lower petioles 10–12 cm, sheaths narrow-oblong; blades oblong-ovate, 10–15 cm, 2-ternate-pinnate; pinnae 5–6 pairs, petiolulate; ultimate segments ovate to obovate, 1–2 × 0.5–1 cm, cuneate, incised-dentate. Leaves gradually reduced upwards. Umbels ca. 7 cm across; bracts 3–6, oblong-ovate, 1–2 × ca. 0.5 cm, margin purple-red, serrate, apex cuspidate; rays 5–7, ca. 3 cm, subequal, scabrous-ribbed; bracteoles 6–10, ovate to broad-ovate, ca. 10 × 4–6 mm, longer than flowers, similar to bracts; pedicels numerous, ca. 4 mm. Calyx teeth obsolete. Petals broad-ovate, white. Stylopodium short-conic. Fruit oblong, 3.5–5 × 2–3 mm; ribs all broadly sinuolate-winged; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Jul–Sep.

High-altitude grassy slopes; 3800–4700 m. SW Xizang [Bhutan, Nepal, Sikkim].