紫脉滇芎 zi mai dian xiong

Trachydium rubrinerve Franchet, Bull. Soc. Philom. Paris, sér. 8, 6: 112. 1894; Physospermopsis muktinathensis Farille & S. B. Malla; Pleurospermum rubrinerve (Franchet) M. Hiroe.

Plants 35–50 cm. Root stout, long-conic. Stem dark purple, little branched above. Basal petioles 5.5–9 cm, sheaths ovate and membranous; blade ovate to broadly ovate in outline, 3.5–5 × 3–4 cm, pinnate; ultimate segments ovate or rhombic, 1.5–2.5 × 1–1.5 cm, base cuneate, margin coarsely incised-toothed or lobed, nerves partly purple-red. Leaves reduced upwards. Umbels 5–15 cm across; peduncles 6–23 cm; bracts 2–5, obovate-lanceolate, leaf-like, apex pinnate; rays 9–14, unequal; bracteoles 3–4, margin purple-red, nearly as long as flowers; umbellules 9–25-flowered, pedicels 2–4 mm. Calyx teeth small, triangular. Petals white, margin purple-red, ca. 0.8 mm. Fruit broadly ovoid, ca. 3 × 3 mm. Seed face concave. Fl. and fr. Aug–Oct.

Open grasslands; 3200–4800 m. SW Sichuan, Yunnan [NE India, Nepal].