生活型

herb

形態特徵

• Herbs perennial.
• rosetted blades oblong, simple to parted, apex obtuse to acute, margin entire, glabrous to sparsely villose, both surfaces glabrous to sparsely villose, blade lobes linear to lanceolate, sparsely villose, hairs on abaxial surface denser than adaxial surface, margin sparsely villose, cauline blades linear, simple to parted.
• capitulum arranged as a cyme, composed of ray florets, involucral bracts lanceolate, apex obtuse, margin membranous, 2.5 – 15 mm long; chaff lanceolate, apex trifid, 1-nerved, membranous, ca. 16 mm long; corolla whitish, ca. 8 mm long, anther syngenesious, base obtuse, apex acute, ca. 1.5 mm long, stigma ca. 1.5 mm long; achene ellipsoid, scabrous, ca. 4 mm long, apex long-beaked, scabrous, ca. 4.5 mm long, pappus plumose sparingly, ca. 7.5 mm long, branch 1 – 2 mm long.

分布

• 台灣 : this alien plant is naturalized in grasslands of park, roadsides or school campuses in urban areas of northern Taiwan.
• 世界 : native to South America and naturalized in Australia and North America.

引證標本

Taipei City, Kuantu, 25 May 2005, S.-W. Chung 8155 (TAIF); Taipei Co., Bali Town, Pali, 18 Apr 2009, S.-W. Chung 9586 (TAIF), Linkou Town, Linkou Interchange, 4 Apr 2009, C.-M. Wang 12870 (TNM), same loc., 9 Apr 2009, C.-M. Wang 12899 (TAIF, TNM), Linkou Junior High School』s campus, 14 May 2008, M.-J. Jung 2918 (TAIF); Taoyuan Co., Kueishan Town, Ming Chuan University, Taoyuan campus, 22 Apr 2009, Y.-C. Lin s. n. (TAIF), Luchu Town, Guang Ming Junior High School』s campus, 14 Apr 2009, M.-J. Jung 3920 (TAIF), Nankan, 14 Apr 2009, M.-J. Jung 3928 (TAIF); Hsinchu City, Nanya Park, 11 Apr 2008, M.-J. Jung 2676 (TAIF), same loc., 9 May 2008, M.-J. Jung 2883 (TAIF).

引用文獻

• Ming-Jer Jung, Ming-Jou Wu and Shih-Wen Chung, Taiwania 54(4): 391-398. 2009.