5. Pleurospermum hedinii Diels in Hedin, S. Tibet. 6(3): 52. 1922.
垫状棱子芹 dian zhuang leng zi qin
Cortiella hedinii (Diels) C. Norman; Hymenidium hedinii (Diels) Pimenov & Kljuykov.
Plants dwarf, rosette, 4–8 cm. Stem very short, 1–1.5 cm thick, fleshy. Basal petioles 3–5 cm, flattened, winged, sheaths narrow, oblong; blades oblong, 3–5 × 1–1.5 cm, 2-pinnate; pinnae 5–7 pairs, sessile; ultimate segments obovate, 1.5–3 × 0.5–1.7 mm, apex small-toothed. Umbel densely capitate, terminal, 5–12 cm across; peduncles greatly reduced; bracts numerous, leaf-like, 2.5–3 cm; rays 40–50, thick, fleshy, outer rays up to 2–3 cm, central rays shorter; bracteoles 8–12, obovate or oblanceolate, 4–10 mm, pale green margin broad, white, apex 3-lobed; pedicels numerous, thick, fleshy, 1–2 mm. Calyx teeth triangular, ca. 0.5 mm. Petals rounded, white to purplish-red. Anthers black-purple. Stylopodium short-conic. Fruit broad-ovoid, 4–5 × 3–3.5 mm; ribs broadly sinuolate-winged; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Aug, fr. Aug–Sep.
Alpine grasslands; 4200–5000 m. S and W Qinghai, E Xizang, NW Yunnan.
This species is considered closely related to, and is sometimes treated as conspecific with, Pleurospermum stellatum.