疏齿丝瓣芹 shu chi si ban qin

Pimpinella forrestii (H. Wolff) M. Hiroe.

Plants ca. 40 cm high. Root tuberous, elongate, ca. 12 × 7 mm. Stem ribbed, little-branched above. Lower leaves petiolate, petioles 7–13 cm, slender, sheaths narrowly lanceolate; blade triangular-ovate, 4–6 × 3.5–5 cm, 2–3-ternate-pinnate; pinnae 3 pairs, petiolules of proximal pinnae ca. 5 cm; ultimate segments oblong or cuneate-oblong, 3–8 × 0.5–2 mm, entire or apex sparsely obtuse-toothed. Umbels 5–7 cm across; peduncles 2.5–4 cm; bracts and bracteoles absent; rays 8–12, up to 4 cm, very unequal, slender, scabrous on inner surface; umbellules 6–11 mm across, 10–15-flowered; pedicels 3–5 mm, scabrid. Calyx teeth narrowly triangular, ca. 3 mm. Petals purple-red, narrowly lanceolate, 2–3 × 0.5–0.75 mm; apex long-linear, ca. 1 mm. Ovary broad-ovoid. Stylopodium depressed. Fruit unknown. Fl. Sep.

Open stony pastures; 3600–4000 m. NW Yunnan.

This incompletely known taxon is recorded only from the type gathering.