生活型

herb

形態特徵

• Perennial herbs to 40 cm long; stems usually simple, branches winged, puberulous along the angles.
• Leaves oblong-ovate to elliptic to oblong-obovate, 1.5–5 cm long, 8–25 mm wide, apex acuminate, base obtuse to attenuate, scabrous; petiole 1–5 mm long; stipules ca. 7 mm long, ca. 5 mm wide, with 5–7 setae, setae dendritic.
• Flowers few in ebracteolate heads; calyx lobes 4, deltate, ca. 1.5 mm long; corolla funnelform, white, 4–5 mm long, tube and throat pilose inside, lobes ovate; stamens inserted in corolla tube, with distinct filaments, exserted; style ca. 2 mm long, exserted.
• Fruit globose, ca. 3 mm in diam., hispidulous.

分布

• 台灣 : common in red soils around 300 m.
• 世界 : Native to tropical America, widely naturalized in tropical Asia.

引證標本

TAIPEI: Sanhsia, Peng 6232; Tatungshan, Hsu 6406. TAOYUAN: Jenmei, Kao 6284. HSINCHU: Shanchiao, Chaw & Peng 347. TAICHUNG: Houli, Hsu 4690. NANTOU: Chushan, Huang 3484; Kuantaohsi, Moo 2305. PINGTUNG: Wanluan, Chaw & Peng 255.

引用文獻

• LIU, Ho-Yih, YANG, T. Y. Aleck, LI, Sung-Po and LI, Hen-Jung, Flora of Taiwan, second edition 4: 329. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)