秃梗露珠草 tu geng lu zhu cao

Circaea cordata Royle var. glabrescens Pampanini, Nuovo Giorn. Bot. Ital. 17: 677. 1910.

Plants 12-80 cm tall, pubescent with short, soft, falcately recurved hairs, rarely glabrous. Rhizomes not tuberous. Leaves narrowly to broadly ovate, 3.7-11 × 1.8-5 cm, base rounded or rarely subcordate, margin denticulate, apex acuminate to shortly acuminate. Racemes simple or branched at base, 2-18 cm; flowering pedicel perpendicular to axis of raceme, glabrous, subtended by a setaceous bracteole. Buds commonly pubescent with a few, long, straight to slightly bent hairs, occasionally also with short uncinate hairs. Floral tube 0.9-1.3 mm. Sepals reflexed in flower, pink or greenish white, oblong to nearly ovate, 1.8-3.3 × 1.2-1.7 mm, apex acute or obtuse. Petals pink, oblate to broadly obovate in outline, 1-1.9 × 1.3-2.6 mm, apex obcordate, apical notch ca. 1/2 length of petal; petal lobes broadly rounded. Stamens spreading, shorter than style; nectary wholly within floral tube and inconspicuous. Fruiting pedicel and mature fruit 4.5-8.5 mm. Fruit 2.5-3.3 × 1.6-1.8 mm thick, locules 2, 2-seeded, obovoid to pyriform, tapering smoothly to pedicel, without ribs or sulci but with a shallow groove extending from pedicel. Seed 1 per locule. Fl. Jul-Aug, fr. Aug-Sep. 2n = 22*.

● Deciduous forests; 700-2500 m. SE Gansu, W Hubei, C and S Shaanxi, SW Shanxi, N Sichuan, Taiwan.