生活型

tree-shrub

形態特徵

• Evergreen shrubs or trees; twigs grayish brown, terete, young twigs soon turning to grayish brown, minutely appressed hairy, soon glabrescent, ridged below petioles.
• Leaves narrowly obovate or obovate, 4–15 cm, 1–4 cm wide, apex shortly caudate with blunt and also apiculate tip, base attenuate, margins slightly recurved, almost subentire or crenulate with teeth, teeth 1–6 mm apart, lustrous green on upper surface, glabrous, somewhat glaucous on lower surface, sparsely minutely appressed pubescent; midrib usually prominent on upper surface at least at base of blade, usually flat or impressed at distally part, very prominent on lower surface, nerves 8–10 pairs, meeting in an intramarginal vein, slightly prominent on lower surface, petiole minutely appressed pubescent or glabrescent, 3–10 mm long.
• Inflorescences terminal and axillaryon twigs and/or from axils of leaves, densely panicles ulate on male plants, and racemose onin female plants, axis appressed pubescent, to 2 cm long, bracts caducous, ovate to elliptic, apex glandular, acute or obtuse, keeled, 1.5–2.5 mm long, adaxially glabrous, abaxially densely appressed pubescent, margin ciliate, bracteoles 2, caducous, ovate to triangular, folded and keeled, apex glandular, acuminate, appressed hairy along midrib, margin ciliate, pedicels to 2 mm long. Staminate flowers with calyx tube 0.5–0.8 mm long, glabrous or sparsely minute hairy, limb ca. 1 mm long; lobes imbricate, ovate or widely ovate, apex obtuse, glabrous or minutely appressed hairy; corolla 2.5–3 mm long, deeply 5-lobed, lobes elliptic; stamens 15–20; disc glabrous, pulvinate; style lacking. Bisexual (female) flowers with calyx tube 1–1.5 mm long, glabrous or sparsely minutely pubescent; limb ca. 1 mm long; lobes imbricate, ovate, obtuse at apex, ciliate, glabrous or sparsely with minute appressed hairs, corolla ca. 2.5 mm long, deeply 5-lobed; stamens usually 5, alternipetalous, but often abnormally developed; disc annular, glabrous or with minute hairs; style glabrous, ca. 1.5 mm long; ovary 3-locular.
• Fruits ovoid, 7–10 mm long, 4–6 mm in diam., stone smooth, endocarp woody; seed 1, longitudinally curved, with similarly curved embryo.

分布

• 台灣 : 900–2,000m, in the northeastern part.
• 世界 : Southern China, Indo-Indochina and the Malay Peninsula.

引證標本

TAIPEI: Togokei, Agyoku, Simizu 2755; Mt. Peichatenshan, 1400–1727 m, Li 3551, 3552, Lu 17327. ILAN: Mt. Taiping-shan, Suzuki 233, 963, 3816, 3999; Tayenshan, 950–1100 m, Kao K3223; Yuanianghu, 2000 m, Lu 2885. HUALIEN: Taroko, Sasaki s. n. TAITUNG: Mt. Shinkangshan, Yamamoto 1026; Mt. Seikoo, Yamamoto 2304; Chinshuiying, Kanehira s. n.

引用文獻

• NAGAMASU, Hidetoshi, Flora of Taiwan, second edition 4: 126. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)