生活型

herb

形態特徵

• Herbs, erect to ascending, 3-20 cm tall, stems dichotomous, pilose; leaves cauline, alternate, base nearly amplexicaul.
• blade obovate, 7-35 mm long, 7-15 mm wide, parted, pinnatisect to bipinnatisect, lobes linear, apex acuminate, sparsely to densely pilose, hairs to 2 mm long.
• Capitulum 3-6 mm in diameter, terminal or axilary, peduncle unbranched, 15-70 mm long; involucral bracts 2-seriate, elliptic, apex round, margin hyaline, 1-nerved, glabrous to sparsely pilose, hairs 0.3-0.5 mm long; florets dimorphic: marginal florets pedicellate, pedicel ca. 0.5 mm long, ovary obovate, papillose, compressed, ca. 0.6 mm long, corolla lacking, pistilate, pistil ca. 0.4 mm long; central florets 1.2-1.5 mm long, ovary glabrous, smooth, corolla tabulate, pale yellow.
• Achenes obovate, apex round, strongly flattened; achenes of marginal florets 1.2-1.5 mm long, margins thinly winged, wings membranous, style and stigma persistent, ca. 0.3 mm long; achenes of central florets wingless, 1.1-1.2 mm long.

分布

• 台灣 : in grassy parks and at roadsides in Hsinchu City, northern Taiwan.
• 世界 : native to Australia and naturalized in America, Canary Island, Chile, Hawaii, Japan, Mexico, New Zealand, S. Africa, and as far north as Norway.

引證標本

Hsinchu City, Chertuchi Park, 9 May 2008, M.-J. Jung 2905 (TAIF); Nanya Park, 11 Apr 2008, M.-J. Jung 2677 (TAIF), 9 May 2008, M.-J. Jung 2885 (TAIF); Park of Hsinchu Performing Arts Center, 11 Apr 2008, M.-J. Jung 2682 (TAIF).

參考文獻

• Ming-Jer Jung, Tian-Chuan Hsu, Shih-Wen Chung and Ching-I Peng, Taiwania 54(1): 76-81. 2009.