生活型

vine

形態特徵

• Climbing vines to 4 m long, 3-4 mm thick. Stem and branches angled, glabrous, with scattered spines or smooth; internodes of branches 1-4 cm long, 1-2 mm thick.
• Leaf blade broadly ovate to ovate or narrowly ovate, base cordate, apex rather gradually narrowed, acute or cuspidate, thin herbaceous, 2-2.5(-7) cm long, 1.5-2.5(-3) cm wide; costas 5 or 7, including slender marginal pair, conspicuously on lower surface prominent on upper surface, separate to base; lateral veinlets slender, oblique manifest on lower surface; petiole 7-16 mm long, 0.7-1 mm thick, sheathing halfway, wings herbaceous, ending in a small cusp; tendrils 2-12 cm long.
• Umbels of both sexes solitary in several nodes of branches, 1.2-1.8 cm across; pistillate umbels 5-13-flowered, staminate ones 8-20-flowered; peduncle from non prophyllate axils, 1-3 cm long; rays 6-10 mm long. Staminate tepals spreading to oblique; outer tepals deltoidovate, 4-4.5 mm long; inner tepals lanceolate, 3-3.7 mm long, stamens 6; anthers 1.5 mm long filaments 2 mm long. Pistillate flowers: staminodia 3, needle-like.
• Berries globose 5-6 mm in diam., blue black; seeds 1.

物候

flowering in spring.

分布

• 台灣 : forest 1,700-2,500 m.
• 世界 : Central Japan through southern Korea southwestward to eastern and southern China.

引證標本

TAICHUNG: Anmanshan, Wang 1365. NANTOU: Shanlinhsi, Kao S2337. CHIAYI: Alishan, Chen 10035. KAOHSIUNG: Chuyunshan, Wang 1214, 1298; Kuanshan, Wang 1125. PINGTUNG: Hsiaokueihu, Wang 1253. HUALIEN: Chingshuishan T. Shimizu 12398; Mukuashan, Peng 7352.

參考文獻

• KOYAMA, Tetsuo, WANG, Kuang-Yuh, LU, Fu-Yuan, and OU, Chern-Hsiung, Flora of Taiwan, second edition 5: 129. 2000.  (Fl. Taiwan 2nd edit.)