生活型

tree

形態特徵

• Deciduous tree to 17 m high, with trunks 0.6 m across; bark blackish, furrowed; branches grayish-brown; young branchlets light golden-brown hairy; buds ovoid.
• Leaves obovate, 13–25 cm long, 8.5–17 cm broad, obtuse at apex, auriculate, rounded to cuneate at base, with 6–10 wavy lobes on each side, soft-stellate hairy on both sides at first, becoming glabrous above, lateral veins 8–12 pairs; petioles very short to 0.3–0.9 cm long, densely gray-hairy.
• Staminate inflorescence catkins, pendulous, ca. 9 cm long; staminate flowers 2.5 mm long, 2.5 mm broad, yellowish; perianth 5–6-lobed, lanceolate, hairy outside; stamens 6–8 (4–11), the filaments 1.3–1.5 mm long, anthers 1 mm long, connectives sparsely long-hairy. Pistillate flowers very short-peduncled; perianth 5–7-lobed, triangular, enclosed in involucre, styles 3, stigmas enlarged, truncate.
• Cupules cup-like, scales numerous, brownish, flat, imbricate, lanceolate, somewhat spreading, recurved, tomentose; nuts ellipsoid, 1.5–2 cm long, 1.2–1.5 cm broad, brownish.

物候

Staminate flowers appearing with new Leaves from March to May; fruits maturing from October to November.

分布

• 台灣 : found in the central part at altitudes of 300–1000 m (Hsinshe and Tungshih, Taichung) and southern part at 800–1,600 m (Yichangshan, Lanwulushan and Shenchihshan, 5–10 km east of Wutai, Pingtung). Q. dentata usually forms pure stands on the ridges
• 世界 : Widely distributed in E Asia, including China (from south to north), Mongolia, Korea and Japan .

引證標本

TAICHUNG: Tungshih, Kawakami & Nakahara 804; Mt. Pashien, Sasaki 36667; Shintsuang, Kawakami & Shimada 32; Tanankun, Kawakami & Mori 1220; Hsinshe, Liao 13100, Chuong 262.

參考文獻

• LIAO, JIH-CHING, Flora of Taiwan, second edition 2: 115. 1996.  (Fl. Taiwan 2nd edit.)