鼎湖青岡
鼎湖青岡 |
中文名:鼎湖青岡 界:植物界 門:被子植物門 Angiospermae 綱:雙子葉植物綱 Dicotyledoneae 亞 綱:原始花被亞綱 Archichlamydeae 目:山毛櫸目 Fagales 科:殼斗科 Fagaceae 屬:青岡屬 Cyclobalanopsis 種:鼎湖青岡 分布區域:中國廣東 中文學名:Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen |
鼎湖青岡(dǐng hú qīng gāng,學名:Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen)為常綠喬木。產廣東高要鼎湖山海拔950米處。[1]
目錄
鼎湖青岡形態特徵
常綠喬木,高8米。 一年生枝灰褐色,幼時被黃褐色捲曲厚絨毛,有縱溝槽及蠟層,二年生枝深灰色,無毛。
葉片長橢圓形,長8-9厘米,寬2-2.5厘米,頂端圓,基部楔形或窄圓形,全緣,微反卷,側脈每邊12-13條,幼葉兩面被淡黃色厚絨毛,老時無毛,葉面深綠色,葉背淺綠色;葉柄長1-1.5厘米。 果序生於當年生枝頂端,長不及1厘米,果常成對。
殼碗形,包着堅果約1/3,直徑2-2.5厘米,高約1.8厘米,壁厚而堅硬,厚約4毫米,被淡褐色絨毛,後脫落;小苞片合生成4-5條同心環帶,環帶全緣。
堅果橢圓形,直徑1.7-2厘米,高3-3.5厘米,柱座明顯,果臍微凸起,徑約5毫米。 [2]
Cyclobalanopsis dinghuensis (Huang) Y. C. Hsu et H. W. Jen in Journ. Beij. Forest. Univ. 15(4): 44. 1993; 中國樹木志2: 2313. 1985. nom. inval. ——Quercus dinghuensis Huang in Acta Phytotax. Sin. 16(4): 74. f. 1. 1978; 中國高等植物圖鑑, 補編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)