Dioscorea formosana
山羊百科，林文智老師的植物、山岳、攝影紀錄
Dioscorea formosana R. Knuth
Dioscorea formosana R. Knuth in Pflanzenr. 87(4-43):268. 1924; Yamamoto, Suppl. Icon. Pl. Formos. 3:7. 1927; Sasaki, List Pl. Formos. 114. 1928; Nemoto, Fl. Jap. Suppl. 1084. 1936; Liu, T. S. & T. C. Huang, Bot. Bull. Acad. Sin. 3(2):139. 1962; Liu, T. S. & T. C. Huang in Fl. Taiwan 5:106. 1978.
BY:Liao chunkuei
目錄 |
SYNONYMS
HABIT DESCRIBE
A glabrous scandent vine from tuber; underground tuber ovate, calabash-like, usually string by ovate, calabash-like tubers; epidermis dark-brown; flesh brown, ca. 3 cm in diameter, up to 15 cm long; aerial stems , terete, ca. 2-3mm, dextrorse, branched, herberous or slightly woodly, rigid, yellow-green, brown; raise from a corm-structure which ca. 3-5 mm in diameter; with prickly; never aerial tuber. Leaves alternate ovate-lanceoleted, ca. 9.5-12 cm long, ca. 2.5-4.5 cm wide, acuminate at apex, sagittate or cordate at base, herberous, green or yellow-green; nerves 7; veins prominent and convex on lower surface; petiole ca. 4-8 cm long, 1-1.5mm thick, twisted and dilteled at base, prickly, sulcate above; pulvinus bearing 2-3 curvered prickies. Usually with black or dark-brown specks on leaves or stems.
Infloresences and fruits unobserved.
Endemic. Distributed in Taiwan
The flowers and fruits has never been seen.
TYPIFICATION: Formosa: Keelung, Warburg 9680 (B, copy by paper)
SPECIMENS EXAMINED
SPECIMENS EXAMINED. Taipei City: S. Sasaki s.n. in 1928 (TAI 30936); Mt. Oobi(Suogun), G. Masamune s.n. in 1938 (TAI 30908); Kuaoyinshan. Taipei Hsien: Wantan, E. Simizu 7672 (TAI). Pingtung Hsien: Chialoshei, C. K. Liao 984.
