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鼎湖青冈 |
中文名:鼎湖青冈 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:鼎湖青冈 分布区域:中国广东 中文学名:Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen |
鼎湖青冈(dǐng hú qīng gāng,学名:Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen)为常绿乔木。产广东高要鼎湖山海拔950米处。[1]
鼎湖青冈形态特征
常绿乔木,高8米。 一年生枝灰褐色,幼时被黄褐色卷曲厚绒毛,有纵沟槽及蜡层,二年生枝深灰色,无毛。
叶片长椭圆形,长8-9厘米,宽2-2.5厘米,顶端圆,基部楔形或窄圆形,全缘,微反卷,侧脉每边12-13条,幼叶两面被淡黄色厚绒毛,老时无毛,叶面深绿色,叶背浅绿色;叶柄长1-1.5厘米。 果序生于当年生枝顶端,长不及1厘米,果常成对。
壳碗形,包着坚果约1/3,直径2-2.5厘米,高约1.8厘米,壁厚而坚硬,厚约4毫米,被淡褐色绒毛,后脱落;小苞片合生成4-5条同心环带,环带全缘。
坚果椭圆形,直径1.7-2厘米,高3-3.5厘米,柱座明显,果脐微凸起,径约5毫米。 [2]
Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen in Journ. Beij. Forest. Univ. 15(4): 44. 1993; 中国树木志2: 2313. 1985. nom. inval. ——Quercus dinghuensis Huang in Acta Phytotax. Sin. 16(4): 74. f. 1. 1978; 中国高等植物图鉴, 补编1: 117. 1982.
Quercus dinghuensis C. C. Huang, Acta Phytotax. Sin. 16 (4): 74. 1978.
Trees to 8 m tall. First-year branchlets grayish brown, sulcate, waxy, tawny woolly-tomentose; 2nd-year branchlets dark ashy, glabrescent. Petiole 1-1.5 cm; leaf blade oblong-elliptic, 8-9 × 2-2.5 cm, pale brown tomentose, glabrescent, abaxially grayish green, adaxially dark green, base cuneate to narrowly rounded, margin entire and slightly recurved, apex rounded; secondary veins 12 or 13 on each side of midvein. Infructescences on terminal new shoots, less than 1 cm, usually 2-fruited. Cupule bowl-shaped, ca. 1.8 × 2-2.5 cm, enclosing ca. 1/3 of nut, outside grayish brown tomentose but glabrescent, wall ca. 4 mm and hard; bracts in 4 or 5 rings, margin entire. Nut ellipsoid, 3-3.5 × 1.7-2 cm; scar ca. 5 mm in diam., slightly convex; stylopodium persistent, evident.
- Broad-leaved evergreen forests in mountains; circa 1000 m. Guangdong (Dinghu Shan)