生活型

herb

形態特徵

• Stemless annuals.
• Leaves radical, linear, ribbonlike, glabrous, 5-9.5 cm long, 3-5 mm wide, apex acute to acuminate, 10-12-nerved; peduncles numerous, glabrous, 10-22 cm long, 5-ribbed, twisted, tubular bladeless sheath, glabrous, 2-5.5 cm long, apex oblique; heads hemispherical, 3-4 mm long, 5-6 mm in diam.; involucral bracts obovate, membranaceous, pale brown, glabrous, apex obtuse, 2-2.2 mm long, 1.2-1.5 mm wide; receptacle glabrous; floral bracts obovate, membranaceous, black, apex deltoid, 1.7-2 mm long, 0.8-0.9 mm wide, densely white clavate hairy on upper margin and on back.
• Staminate flowers: calyx spathe like, open on one side, obovate, black, 2 mm long, 0.8 mm wide, apex trilobate or deeply trilobate, with white clavate hairs on upper margin; corolla lobes 3, with black glandes and few white clavate hairs at apex; anthers 6, black. Pistillate flowers: sepals 3, free, oblanceolate-linear, black, 1.8-2 mm long, apex acute, with white clavate hairs on upper back; petals 3, free, narrowly oblanceolate, 1.6 mm long, pale brown, pilose, sparsely white clavate hairy at apex; ovary 3-locular, glabrous; stigmas 3, shorter than style.
• Seeds subglobose, 0.5 mm long, pale brown, with transverse reticulations and I-shaped appendages.

分布

• 台灣 : in wet places.
• 世界 : India, Nepal, Thailand, Burma, Japan, China.

參考文獻

• LI, Sung-Po and HSIEH, Chang-Fu, Flora of Taiwan, second edition 5: 184. 2000.  (Fl. Taiwan 2nd edit.)