柔毛油杉Keteleeria pubescens
中文名(Chinese Name):柔毛油杉
学名(Scientific Name):Keteleeria pubescens Cheng et L. K. Fu
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Keteleeria davidiana var. pubescens (W. C. Cheng et L. K. Fu) Silba
科属(Family & Genus):松科Pinaceae油杉属
形态特征(Description):乔木,树皮暗褐色或褐灰色,纵裂;一至二年生枝绿色,有密生短柔毛,干后枝呈深褐色或暗红褐色,毛呈锈褐色。叶条形,在侧枝上排列成不规则两列,先端钝或微尖,主枝及果枝的叶辐射伸展,先端尖或渐尖,长1.5-3厘米,宽3-4毫米,上面深绿色,中脉隆起,无气孔线,下面淡绿色,沿中脉两侧各有23-35条气孔线,干后边缘多少向下反曲;横切面上面有一层不连续的皮下层细胞,其下有少数散生皮下层细胞,两侧端及下面中部有一层连续的皮下层细胞。球果成熟前淡绿色,有白粉,短圆柱形或椭圆状圆柱形,长7-11厘米,径3-3.5厘米;中部的种鳞近五角状圆形,长约2厘米,宽与长相等或稍宽,上部宽圆,中央微凹,背面露出部分有密生短毛,边缘微向外反曲;苞鳞长约为种鳞的2/3,中部窄,下部稍宽,上部宽圆。近倒卵形,先端三裂,中裂呈窄三角状刺尖,长约3毫米,侧裂宽短,先端三角状,外侧边缘较薄,有不规则细齿;种子具膜质长翅,种翅近中部或中下部较宽,连同种子与种鳞等长。
分布(Distribution):为我国特有树种,产于广西北部罗城至宜山、贵州南部黎平、从江、下江,生于气候温暖、土层深厚、湿润、海拔600-1100米的山地。
用途(Use):
引自中国植物志英文版FOC Vol. 4 Page 43
Keteleeria pubescens W. C. Cheng & L. K. Fu in W. C. Cheng et al., Acta Phytotax. Sin. 13(4): 82. 1975.
柔毛油杉 rou mao you shan | Pinaceae | Keteleeria
Keteleeria davidiana (Bertrand) Beissner var. pubescens (W. C. Cheng & L. K. Fu) Silba.
Bark dark brown or brownish gray, longitudinally fissured. Branchlets green in 1st or 2nd year, finally dark brown or dark reddish brown, densely pubescent. Leaves irregularly pectinately arranged on lateral branchlets, directed forward on main and cone-bearing branchlets, linear, 1.5-3 cm × 3-4 mm, stomatal lines abaxial, margin reflexed when dry, apex obtuse or acute. Seed cones glaucous when immature, ellipsoid-cylindric, 7-11 × 3-3.5 cm. Seed scales at middle of cones subcordate, ca. 2 × 2 cm, densely pubescent abaxially, distal margin emarginate or truncate, slightly recurved. Wing of seeds light brown, semitrullate.
* Hills, mountains; 600-1000 m. N Guangxi, S Guizhou
Some authors place this species within Keteleeria davidiana.
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