露珠草(原亚种) lu zhu cao (yuan ya zhong)

Circaea caulescens (Komarov) Nakai ex H. Hara var. glabra H. Hara; C. caulescens f. ramosissima H. Hara; C. caulescens var. rosulata H. Hara; C. lutetiana race alpina (Linnaeus) H. Léveillé; C. lutetiana subsp. alpina (Linnaeus) H. Léveillé.

Plants 3-30 cm tall. Stem glabrous, sometimes with glan- dular hairs in inflorescence. Leaves translucent, ovate to broadly so, rarely nearly circular in outline, base cordate to subcordate, less commonly truncate or rounded, margin conspicuously dentate, apex shortly acuminate to acute. Inflorescence simple or with lateral racemes from base, glabrous to densely pubescent with short glandular hairs; flowering pedicel ascending or erect, glabrous, with a setaceous bracteole at base; flowers opening before elongation of raceme and clustered at its apex. Buds glabrous; floral tube nearly absent to 0.5 mm. Sepals oblong to ovate, sometimes broadly so, apex rounded to obtuse or minutely mammiform. Petals white, obtriangular to obovate, apical notch, 1/4-1/2 length of petal; petal lobes rounded. Uncinate hairs of fruit unpigmented. Fl. Jun-Aug(-Sep), fr. Jul-Sep. 2n = 22.

Moist to wet places, on moss-covered rocks and logs; near sea level to 2500 m. Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Shanxi [Japan, Kazakhstan, Korea, Mongolia, Russia; circumboreal in forests between 30°-65° N, but restricted to high elevations at lower latitudes].