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灰背栎Quercus senescens

时间:2013-09-11 10:47来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):灰背栎 学名( Scientific Name ): Quercus senescens Hand.-Mazz. 英文名( English Common Name ): 别名( Chinese Common Name ): 灰背高山栎,灰背山栎 异名( Synonym ): 科属( Family Genus ): 壳斗科(Fagaceae
中文名(Chinese Name):灰背栎
学名(Scientific Name): Quercus senescens Hand.-Mazz.
英文名(English Common Name):
别名(Chinese Common Name):灰背高山栎,灰背山栎
异名(Synonym):
科属(Family & Genus):壳斗科(Fagaceae)栎属
形态特征(Description):常绿乔木或灌木,高达15米。幼枝密被灰黄色星状绒毛,后渐脱落,但老时仍有残存褐色绒毛。叶片长圆形或倒卵状椭圆形,长3-8厘米,宽1.2-4.5厘米,顶端圆钝,基部圆形或浅心形,全缘或有刺状锯齿,幼时两面密被灰黄色非腺质束毛和短柄束毛,老时仅叶背被灰黄色束毛。壳斗杯形,包着坚果约1/2,直径0.7-1.5厘米,高5-8毫米;小苞片长三角形,长约1毫米,覆瓦状紧密排列,被灰色绒毛。坚果卵形,直径0.8-1.1厘米,高1.2-1.8厘米,无毛,果脐突起。花期3-5月,果期9-10月。
分布(Distribution):产四川、贵州、云南及西藏等省区。生于海拔1 900-3 300米的向阳山坡、山谷或松栎林中。为组成西南高山地区硬叶常绿栎林重要树种之一。不丹亦有分布。
引自中国植物志英文版FOC Vol. 4 Page 376
Quercus senescens Handel-Mazzetti, Symb. Sin. 7: 37. 1929.
灰背栎 hui bei li | Fagaceae  | Quercus
Trees or shrubs to 15 m tall. evergreen. Young branchlets densely yellowish grayish brown stellate tomentose, somewhat glabrescent but with a persistent brown indumentum. Petiole 2-4 mm, densely yellowish grayish brown stellate tomentose, glabrescent; leaf blade oblong to obovate-elliptic, (2.5-)3-5(-8) × 1.2-2.5(-4.5) cm, when young densely with pale grayish brown non-glandular fascicled hairs and fascicled hairs on short stalks, abaxially with pale grayish brown fascicled hairs, adaxially glabrescent but base of fascicled hairs remaining evident (under a hand lens), base rounded to shallowly cordate, margin entire or with spiniform teeth, apex obtuse; secondary veins 6-10 on each side of midvein; tertiary veins abaxially obscure under thick indumentum. Infructescence ca. 1 cm, rachis densely pale grayish brown tomentose, glabrescent. Cupule cupular, 5-8 × 7-15 mm, enclosing ca. 1/2 of nut; bracts triangular, ca. 1 mm, crowded, gray tomentose. Nut ovoid, 1.2-1.8 × 0.8-1.1 cm, glabrous; scar 4-5 mm in diam., raised; stylopodium ca. 1 mm in diam. Fl. Apr-May, fr. Sep-Oct.
* 1900-3300 m. Guizhou, Sichuan, Xizang, Yunnan
Quercus muliensis Hu (Acta Phytotax. Sin. 1: 147. 1951), from Sichuan (Muli Zangzi Zizhixian), is probably a hybrid between Q. senescens and Q. monimotricha. It has also been treated as Q. senescens var. muliensis (Hu) Y. C. Hsu & H. W. Jen (J. Beijing Forest. Univ. 15(4): 44. 1993). Quercus muliensis has the growth habit and leaf dimensions characteristic of Q. monimotricha but the leaf and branchlet indumentum characteristic of Q. senescens.





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