生活型

herb

形態特徵

• Herb to 1 m tall, erect, sometimes branched at base, usually branched on upper part of stem, culms cylindrical, villous and glandular.
• leaves alternate, sessile, blade oblance-ovate to obovate, apex round to acute, margin serrate to doubly serrate, base cuneate to attenuate, 1-8 cm long, parted or not, both surfaces villous.
• Inflorescence a lax corymb or cymbose panicle, terminal and axillary, branches leafy, capitulum 8-9 mm tall, 4-6 mm wide, receptacle concave, glabrous; involucres 4-seriate, apex acuminate; margin entire or pilose, outer involucral bracts lanceolate, 2.5-5 mm long, abaxial surface villous and glandular, adaxial surface glabrous to sparsely villous, innermost involucral bracts linear, central part glabrous to sparsely villous, margin membranous, 1-veined, ca. 8 mm long; pappus whitish, ca. 4.5-5 mm long, with appressed teeth; marginal disc florets numerous, pistillate and fertile, corolla filiform, whitish to pale-purplish, 3.5-4.5 mm long, stigma exposed, 0.5-1 mm long; central disc florets fewer than 10 per capitulum, bisexual and fertile, corolla tabular, whitish to pale-purplish, ca. 4.5 mm long, 5-lobed, lobes ca. 0.5 mm long, anthers obtuse at apex, shortly tailed at base, style sparsely pilose, stigma bifid, extracted; achene cylindrical, 10-ribbed, sparsely pilose, carpopodium a broad circle, conspicuous.

分布

• 台灣 : it occurs at roadsides or waste places at low elevations in the south.
• 世界 : widely distributed in the tropics and the subtropics.

引證標本

Kaohsiung Co., Gangshan Town, Gangshan, 30 Apr 2008, M.-J. Jung 2805 (TAIF); Chautou Town, Chautou, 30 Apr 2008, M.-J. Jung 2810 (TAIF); abandoned farm near the National Kaohsiung University campus, 30 Apr 2008, M.-J. Jung 2811 (TAIF); Pingtung Co., Hengchun Town, Hengchun, 7 Apr 2004, G.-P. Hsieh 1964 (PPI), Sherpai Park, 7 Apr 2005, K.-P. Lo 746 (PPI); Linpien Town, Linpien, 26 Dec 2004, K.-P. Lo 595 (PPI); Shuili, 28 Jan 2000, S.-M. Ku 414 (TAIF), Tientzu, 20 Mar 2005, K.-P. Lo 728 (PPI); Tungkang Town, Tungkang, 30 Dec 1999, Y.-P. Cheng 2877 (TAIF). India. Bengal, Buddh Gaya, 17 Jan 1912, T. Kawakami s.n. (TAIF).

引用文獻

• Ming-Jer Jung, Tian-Chuan Hsu and Shih-Wen Chung, Taiwania 54(3): 261-265. 2009.