生活型

tree

形態特徵

• Medium-sized evergreen trees; young leaves rusty-brown-hairy beneath, becoming glabrous later.
• Leaves ovate, ovate-oblong to lanceolate-oblong, rarely long-obovate, 5.7–18 cm long, 1.5–5.8 cm wide, coriaceous, caudate-acuminate or acuminate at apex, acute, obtuse to rounded at base, entire to sparingly serrate toward apex along margins, glabrous and brownish beneath, lateral veins 5–9 pairs, rarely 10 pairs; petioles 0.4–0.9 cm long.
• Staminate catkins about 6 cm long; staminate flowers 3.5 mm long, 2.5 mm wide; perianth 5–6-parted, nearly glabrous outside, sparsely haired inside; stamens 9–12, filaments 3 mm long, anthers 0.2 mm long, longitudinally dehiscent; reduced ovaries 3, hairy. Pistillate catkins about 15 cm long, flowers 1.2 mm long, 1 mm wide; perianth 4–5-lobed; ovary with 3 styles.
• Cupules globose, 2–2.5 cm across, densely spined, spines 0.3–0.7 cm long, very finely tomentose; nut 1–3, clustered in a cupule, 1.5 cm long.

物候

Staminate flowers blooming in July.

分布

• 台灣 : In mountains, such as Alishan, Chiayi; Mt. Mukua, Hualien; Chinshuiying, Tawu; and Nanjenshan, Hengchun.

引證標本

CHIAYI: Mt. Alishan, Tomiya 35847, 35848. HUALIEN: Mukuashan, Tomiya 35860. PINGTUNG: Pingtung, Matuda 35861; Nanjenshan, Sasaki 21431. TAITUNG: Chinshuiying, Kanehira 21299.

參考文獻

• LIAO, JIH-CHING, Flora of Taiwan, second edition 2: 64. 1996.  (Fl. Taiwan 2nd edit.)