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台湾窄叶青冈

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中文名:台湾窄叶青冈 学 名:Cyclobalanopsis stenophylloides (Hayata) Kudo et Masamune 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Dicotyledoneae 亚 纲:原始花被亚纲 Archichlamydeae 目:山毛榉目 Fagales 科:壳斗科 Fagaceae 属:青冈属 Cyclobalanopsis 种:台湾窄叶青冈 分布区域:中国台湾

台湾窄叶青冈 （tái wān zhǎi yè qīng gāng），学名 Cyclobalanopsis stenophylloides (Hayata) Kud & Masam为常绿乔木，高17米，树皮灰白色，开裂。小枝较细，浅灰色，无毛。产于台湾中央山脉。

台湾窄叶青冈形态特征

常绿乔木，高17米，树皮灰白色，开裂。 小枝较细，浅灰色，无毛。

原图链接 来自植物标本馆

叶片革质，长椭圆状披针形，长7-12厘米，宽1.5-3.5厘米，顶端渐尖，基部圆形，叶缘有短芒状锯齿，侧脉每边11-13条，直达齿端，叶面绿色，叶背有白粉及平伏单毛，有时毛脱净；叶柄长1.5-2厘米，无毛。

原图链接 来自植物智

雄花序长7厘米；雌花序长2-2.5厘米，着生花6-7朵。壳斗杯形，包着坚果1/2，直径1.2厘米，高1-1.5厘米；小苞片合生成7-8条同心环带，环带边缘有裂齿，被短绒毛。

坚果椭圆形，直径1.5厘米，高1.7-2厘米，无毛，柱座明显，有环纹3条，果脐平坦。

花期4-5月，果期翌年9-10月。

Cyclobalanopsis stenophylloides (Hayata) Kudo et Masamune in Trans. Nat. Hist. Soc. Form. 20: 162. 1930; Li, Woody Fl. Taiwan 100. 1963; Y. C. Liu, Lign. Pl. Taiwan rev. ed. 299. 1981;中国树木志2: 2320. 1985. ——Quercus stenophylloides Hayata, Ic. Pl. Form. 4: 21. 1914;中国高等植物图鉴, 补编1: 124. 1982. ——Q. stenophylla (Blume) Makino var.stenophylloides (Hayata) A. Camus, Chenes 1: 272. 1936-38; Atlas 2: t. 233. 1936.——Cyclobalanopsis stenophylla (Blume) Schottky var. stenophylloides (Hayata) Liao in Forest ser. 62: 48. 1974; Li ＆ al. Fl. Taiwan 2: 76. 1976.

Quercus stenophylloides Hayata, Icon. Pl. Formosan. 4: 21. 1914; Cyclobalanopsis stenophylla (Blume) Schottky var. stenophylloides (Hayata) J. C. Liao; Q. salicina Blume var. stenophylloides (Hayata) S. S. Ying; Q. stenophylla (Blume) Makino var. stenophylloides (Hayata) A. Camus.

Trees to 17 m tall. Branchlets slender, gray, glabrous. Petiole 1.5-2 cm, glabrous; leaf blade oblong-elliptic to lanceolate, 7-12 × 1.5-3.5 cm, leathery, abaxially farinose and with prostrate simple hairs but usually glabrescent, adaxially green, base narrowly acute to rounded, margin with short, awnlike serrations, apex acuminate to caudate; secondary veins 11-13 on each side of midvein, extending into serration; tertiary veins abaxially inconspicuous to obscure. Female inflorescences 2-2.5 cm, cupules 6 or 7. Cupule cupular, 1-1.5 × ca. 1.2 cm, enclosing ca. 1/2 or less of nut, outside and inside grayish velutinous, wall less than 1 mm thick; bracts in 6 or 8 rings, margin dentate. Nut ellipsoid, 1.7-2 × ca. 1.5 cm, glabrous; scar ca. 5 mm in diam., flat; stylopodium persistent, conspicuous, 3-ringed. Fl. Apr-May, fr. Sep-Oct of following year.

• Broad-leaved evergreen forests in mountains; (500-)1100-2600 m. C to N Taiwan

The Japanese Cyclobalanopsis salicina (Blume) Oersted has been reported in Taiwan (J. C. Liao, Fl. Taiwan, ed. 2, 2: 84. 1996). Cyclobalanopsis salicina and C. stenophylloides are very closely related, but the plants in Taiwan are apparently populations of C. stenophylloides growing on sandstone ridges at lower elevations than is typical for this species.

台湾窄叶青冈生长环境

生长于海拔1100-2 600米的山地森林中。

台湾窄叶青冈分布范围

产于台湾中央山脉。