4. Pleurospermum heterosciadium H. Wolff, Repert. Spec. Nov. Regni Veg. 21: 243. 1925.
异伞棱子芹 yi san leng zi qin
Hymenidium heterosciadium (H. Wolff) Pimenov & Kljuykov; Physospermopsis fuscopurpurea (Handel-Mazzetti) Pimenov & Kljuykov; Trachydium fuscopurpureum Handel-Mazzetti.
Plants dwarf, near rosette, 10–25 cm. Root stout, 5–8 mm across, branched. Stem greatly reduced, ribbed, sparingly branched, base clothed with dense, brown fibrous remnant sheaths. Basal petiole sheaths oblong, membranous; blades oblong to narrowly ovate, 1.8–6 cm, 3-pinnate; pinnae 5–7 pairs, nearly sessile; ultimate segments linear to oblanceolate, 2–4 × ca. 0.5 mm. Peduncle greatly reduced; bracts several, small, leaf-like; rays 8–15, 10–20 cm, unequal; bracteoles 10–15, broadly obovate in outline, 4–10 mm, pale green, margin white in lower half, apex 2-pinnate; pedicels numerous, flattened, 3–5 mm. Calyx teeth triangular, obtuse, minute, ca. 0.3 mm. Petals broad-ovate to broad-oblong, white, apex purple-red with incurved tip. Anthers dark purple-red. Ovary black-gray. Young fruit slightly crisped-winged (mature fruit not known). Fl. Aug.
Alpine grasslands; 3500–4500 m. W Sichuan, SE Xizang.
This incompletely known taxon is recorded from very few collections.