生活型

herb

形態特徵

• Adventitious roots many, narrower than the rhizome, young roots hairy, glabrescent. Rhizomes striate, glabrous; annual vegetative branch with 2 or 3 prophylls on lower part, prophylls 4 mm long, sparsely hairy.
• Leaves long petiolate; petioles hairy when young, glabrescent, grooved; blade triangular, hairy along veins beneath when young, glabrescent, glabrous above, green and white spotted above, pale green and with scattered small glandular dots beneath, acuminate to caudate at apex, cordate and 2-lobed at base, 13-19.5 cm long, 6.6-20 cm broad, lobes 3-9 cm long, 2.8-9.5 cm broad.
• Flowering branch with prophyll scars at the base of pedicel; upper cataphyll membranous, hyaline, ovate, margin hairy, glandular dotted beneath; flowers glabrous outside; calyx tube reticulate-ridged inside, glabrous, orifice rim large, rugous above ridge, with lamellate appendage between orifice and calyx lobes; lobes 3, glabrous inside, with abundant short glands, rough on surface; stamens 12, shorter than pistil; ovary fused; styles 6, free; stigma terminal, or subterminal, orbicular to slightly oblong.
• Seeds ovate, brownish white, glandular dotted, 3.8 mm long.
• <i>Asarum hayatanum</i> (=<i>A. grandiflorum</i>) was separated from <i>A. hypogynum</i> by its larger flowers and terminal, decurrent stigma by Hayata in 1915. Maekawa (1978) mentioned that the stigma of <i>A. hayatanum</i> is terminal and orbicular. In this study, no decurrent stigmas were found except the terminal and subterminal ones, and is here treated as conspecific.

分布

• 台灣 : in the central part; forest floors at 1,000 to 2,000m.

引證標本

NANTOU: Hsitou, Huang et al. 16314; Sunlinksea, Liao et al. 946. CHIAYI: Chuchi, Tatungshan, Yen 7113; Fenchihu, Huang & Huang 15947.

引用文獻

• HOU, DING, Flora of Taiwan, second edition 2: 646. 1996.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)