生活型

herb

形態特徵

• Perennial, slender, prostrate or ascending herbs, pubescent throughout.
• Leaves subsessile, oblong, elliptic, broadly ovate, orbicular or spatulate, 7–20 mm long, 4–10 mm wide, apex obtuse or shallowly emarginate, base rounded, cordate or attenuate, more or less appressed-pilose on both sides or glabrous adaxially.
• Flowers 1-few, axillary; peduncle ca. 2.5–3.5 cm long; pedicel slender, bracts linear, 1.5–4 mm long; sepals small, linear-lanceolate, apex acute, ca. 3 mm long, villous; corolla subrotate, 5–7 mm across, pale blue or white; ovary glabrous.
• Capsules globose, glabrous, 4-valved; seeds black, smooth.
• Although Ooststroom (Meded. Bot. Mus. Herb. Rijks. Univ. Utrecht 14: 1–267. 1934) recognized 3 varieties of <i>E. alsinoides</i> among the Taiwan specimens available to him, further collections have revealed a high degree of intergradation between them. This precludes recognition of any meaningful varietal taxa and we instead recognize a single highly variable species.

分布

• 台灣 : dry grasslands or disturbed sites and roadsides, 800 m–1,000 m.
• 世界 : Tropical Africa, Australia, throughout tropical Asia, North and South America.

引證標本

TAIPEI: Pitouchiao, Wang 1283; Staples et al. 1077. KAOHSIUNG: Tengchih, Wu & Yang 1060. PINGTUNG: Staples & Liu 1095; Tahan forest trail, Leu et al. 645, S. Z. Yang 23535; Wutai, Haocha, Liu et al. 753; Tungkang, Liao s. n.; Maopitou, W. P. Leu 1345, C. -I Peng 7176; Kenting, S. Z. Yang 22902; Oluanpi, Chuang, Kou & Kao 3010; Chialuosue, Ohashi, Nemoto & Kajita 30173; Hsiaoliochio, P. N. Wang 171. TAITUNG: Taitung airport, C. -I Peng 5164, T. I. Chuang 2209. PENGHU: Kueipishan, Chen & Hu 726; Chimeiyu, Chen & Hu 743; Hsiaomen, Yen 2590, Chune 403; Chungshi, Y. L. Chune 435.

引用文獻

• STAPLES, George William and YANG, Sheng-Zehn, Flora of Taiwan, second edition 4: 353. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)