生活型

herb

形態特徵

• Annual herbs to 60 cm long; stems usually with few branches near the base, branches 4-angled and puberulous.
• Leaves obovate to oblong-lanceolate, 1–5 cm long, 4–20 mm wide, apex acute, base obtuse to attenuate, margin somewhat undulate, more or less hirsute; petiole 1–3 mm long; stipules ca. 4 mm long, ca. 3 mm wide, with 5–7 ciliate setae.
• Flowers few in ebracteolate heads; calyx lobes 4, linear, ca. 1 mm long, hirsute; corolla funnelform, white, ca. 3 mm long, tube hairy inside near the base, lobes pubescent on upper outside, tinged pale purple, oblong-ovate; stamens inserted in the corolla tube, with distinct filaments, exserted; style ca. 4 mm long, exserted.
• Fruit globose-ellipsoid, ca. 3 mm long, hispidulous.

分布

• 台灣 : in open sunny places at low elevations.
• 世界 : India, Burma, Indochina, Malaysia, S. China, and Ryukyu.

引證標本

TAIPEI: Tanshui, Peng 10179; Tanhai, Kuo 6411. ILAN: Chiaohsi, Sasaki s. n. 1928. HSINCHU: Lunkan, Chuang 7397. MIAOLI: Houlung, Huang & Kao 6002; Tunghsiao, Kao 5697. CHANGHUA: Mingchih Ditch, Guo et al. 93. YUNLIN: Taihsi, Yang 521. TAINAN: Tainan, Sasaki s. n. 1922. KAOHSIUNG: Chishan, Hsu 6498. PINGTUNG: Hengchun, Chaw 403; Wanluan, Chaw & Peng 261. PENGHU: Penghu, Huang & Kao 6859. TAITUNG: Lutao, Sasaki s. n. 1935.

參考文獻

• LIU, Ho-Yih, YANG, T. Y. Aleck, LI, Sung-Po and LI, Hen-Jung, Flora of Taiwan, second edition 4: 327. 1998.  (Fl. Taiwan 2nd edit.)