短柄丝瓣芹 duan bing si ban qin

Plants 10–40 cm. Root tuberous, subglobose, ca. 0.7 mm thick. Stem branched. Lower leaves petiolate, petioles 4.5–9 cm, sheaths very small; blade triangular or broad-triangular, 2.5–5.5 × 2.6–4 cm, ternate-pinnate; pinnae 2–3 pairs, proximal pinnae short-petiolulate, broad-ovate, 1.3–2 × ca. 1.5 cm, apex 3–5-toothed. Leaflets of upper leaves ovate to linear. Umbels 2.5–3.5 cm across; peduncles ca. 3 cm; bracts and bracteoles absent; rays 5–7, ca. 1 cm, unequal; umbellules 2.3–3 mm across, 6–9-flowered; pedicels very short, 1–2 mm or subsessile. Calyx teeth obsolete. Petals white, ovate-lanceolate, ca. 2 × 0.5 mm; apex long-acuminate. Young fruit ovoid, ribs filiform (mature fruit unknown). Fl. Aug.

Damp forests; 3300–3800 m. Xizang, Yunnan.

This incompletely known taxon is recorded only from a few collections. It was misidentified in FRPS (55(2): 128, fig. 51(part 10). 1985) as the E Himalayan Acronema radiatum (W. W. Smith) H. Wolff (Pimpinella radiata W. W. Smith; currently accepted as Pternopetalum radiatum (W. W. Smith) P. K. Mukherjee & Constance).