生活型

herb

形態特徵

• Rhizome thickened, somewhat ligneous, well developed. Stem short or nearly absent.
• Leaves lanceolate to ensiform, 20-55 cm long, 2.5-4.5 cm wide, apex acuminate to acute, base decurrent, sheathing, entire to slightly undulate, coriaceous, upper surface green, lustrous, lower surface pale green; sheath 1-2 cm long, persistent, glabrous.
• Inflorescence 30-40 cm long. Flowers numerous, blue to dark blue, terminal, panicle to paniculate-corymbose; scape terminal, 40-70 cm long, branching much, glabrous, green, bracteate; bracts lanceolate to ovate-lanceolate, 1-2.5 cm long, 4-7 mm wide, apex acute to acuminate, base amplexicual; pedicels slender, 1-2.5 cm long, green; perianth segments 6, widely spreading, sometimes reflexed, oblong to oblong-lanceolate, 7-8 mm long, 3-4 mm wide, apex subacute, slightly base subcontracted; stamens 6, filaments thickened, 3-4 mm long; anthers acute, yellow; ovary globose, glabrous; style slender, 4-6 mm long; stigma minute.
• Fruit globose to ovoid-globose, ca. 1 cm in diam., dark blue; seeds oblong, black.

分布

• 台灣 : roadsides and exposed fields, sea level to 1,200 m, throughout the island, very common.
• 世界 : Widely distributed in tropical and subtropical regions of Asia, Australia and the Pacific islands.

引證標本

TAIPEI: Yangmingshan, Ying s. n. Apr 1968; Chihsinshan, Ying 782; Neihu, Ying 013, 015, 017. ILAN: Suao, Simada SH1372; Lotung, Suzuki 3645. TAICHUNG: Pahsinshan, Suzuki s. n. May 4, 1909; TAITUNG: Peitawushan, Ying 896; Islet Lanyu, Kuoh 4843, Kawakami & Mori 2452. HUALIEN: Hualien, Simizu & Kao 10539, 11609.

參考文獻

• YING, Shao-Shun, Flora of Taiwan, second edition 5: 41. 2000.  (Fl. Taiwan 2nd edit.)