Cyclobalanopsis hypophaea

灰背櫟

endemic

Cyclobalanopsis hypophaea (Hayata) Kudo

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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Kudo, Journal of the Society of Tropical Agriculture 3: 389. 1931. (J. Soc. Trop. Agr., 熱帶農學會誌)

同發表文獻

Quercus hypophaea Hayata

Hayata, Icones Plantarum Formosanarum 3: 182. fig. 28. 1913. (Icon. Pl. Formos., 台灣植物圖譜)
Lithocarpus hypophaea (Hayata) Hayata

Hayata, General Index to the Flora of Formosa 72. 1917. (Gen. Ind. Fl. Formos., 台灣植物總名錄)
Cyclobalanus hypophaea (Hayata) Nakai

Nakai, Journal of Japanese Botany 15(5): 268. 1939. (J. Jpn. Bot., 植物硏究雑誌)
Pasania hypophaea (Hayata) Li

Li, Bulletin of the Torrey Botanical Club 80: 321. 1953. (Bull. Torrey Bot. Club)

tree

Evergreen trees, 17–18 m high, trunks 1.2 m across; bark grayish-brown; branches yellowish-gray, branchlets deep brown to gray-brown, with gray spots.
Leaves oblong-lanceolate, 6–9.5 cm long, 1.5–2 cm wide, acuminate or acute at apex, cuneate or acute at base, entire, coriaceous, gray-appressed-tomentose, midrib elevated beneath, lateral veins 11–14 pairs, indistinct, flat on both sides or slightly elevated beneath; petioles 0.4–0.7 cm long.
Staminate catkins pendulous, about 5 cm long; Staminate flowers 2.5 mm long, 3 mm wide; perianth 5–6-lobed, puberulent outside, glabrous inside; stamens 5–6, filaments glabrous, 1.6 mm long, anthers 0.9 mm long, puberulent. Pistillate flowers 2 mm long, 1.5 mm wide; ovary 3-celled, with 2 ovules in each cell, styles 3, hairy, stigmas enlarged at tip.
Cupules disk-like, 0.5–0.8 cm long, 1.5–1.8 cm across, tomentose outside, scales in 8–11 concentric rings;nuts globose to ellipsoid, 1.7–2.1 cm long, 1.4–1.8 cm across, gray-tomentose, convex at tip, round at base.

Staminate flowers blooming from December to January.

台灣 : Found only on the slopes of low altitudes in the southeastern part of Taiwan. Specimens were collected at Tawu (Ansu at 30–700 m and Chinshuiying at 200–800 m) and Chihpen (compartment 26 at about 600 m), Taitung.