西藏丝瓣芹 xi zang si ban qin

Plants 30–40 cm. Root slender, cylindric, ca. 3 cm. Stem solitary, thin-ribbed. Basal leaves petiolate, petioles 7–11 cm, slender, sheaths short; blade broad-ovate or broad-triangular, 1–2-pinnate; pinnae 1.5–2 cm, 3-lobed, petiolules 0.5–1.2 cm; ultimate segments ovate to long-elliptic, 7–10 × 0.3–0.4 mm, entire or 2-toothed distally, margin and nerves scabrous adaxially. Umbels 2.5–3 cm across; bracts and bracteoles absent; rays 6–9, ca. 3 cm, subequal; umbellules 5–7 mm across, 7–13-flowered; pedicels 2.5–4 mm, slender. Calyx teeth obsolete. Petals white, ovate-lanceolate, 1.8–2.2 × ca. 0.6 mm; apex linear, 0.6–0.8 mm. Fruit broad-ovoid, ca. 1.8 × 2 mm, base subtruncate to slightly cordate; vittae unknown. Fl. Sep, fr. Oct.

Valley sides; ca. 3400 m. Sichuan, Xizang.

This incompletely known taxon is recorded only from a few collections.