松潘当归 song pan dang gui

Plants perennial, 30–80 cm. Root long-conic, 8–12 cm, yellowish brown, branched. Stem solitary, purplish green, ribbed, pubescent. Basal leaves petiolate, petioles up to 25 cm, sheaths oblong, purplish striate sheaths; blade 2-pinnate, pinnae 3-paired, glabrous; ultimate segments ovate or long-ovate, 3–7 × 2–3.5 cm, margin serrate. Umbels 6–7 cm across; bracts 2–3, linear, ca. 1.5 cm; rays 20–25, 1–5 cm, very unequal, hispid; bracteoles similar to bracts; pedicels 5–15, 2–7 mm, unequal. Calyx teeth minute, triangular. Petals white, obovate, notched. Fruit subovoid, 6–7 × 3–4 mm; dorsal ribs prominent, lateral ribs winged; vittae 1–2 in each furrow, 2 on commissure. Fr. Oct.

Forests; 2900–4000 m. N Sichuan (Songpan).

This rather poorly known species is recorded only from a few collections.