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华南五针松Pinus kwangtungensis

时间:2013-07-15 16:16来源:未知 作者:徐晔春 点击:
华南五针松,Pinus kwangtungensis,广东松,广东五针松


中文名(Chinese Name):华南五针松
学名(Scientific Name): Pinus kwangtungensis Chun ex Tsiang
英文名(English Common Name):
别名(Chinese Common Name):广东松、广东五针松
异名(Synonym):Pinus wangii var. kwangtungensis (Chun et Tsiang) Silba
科属(Family & Genus):松科(Pinaceae)松属
形态特征(Description):乔木,高达30米,胸径1.5米;幼树树皮光滑,老树树皮褐色。厚,裂成不规则的鳞状块片;小枝无毛,一年生枝淡褐色,老枝淡灰褐色或淡黄褐色;冬芽茶褐色,微有树脂。针叶5针一束,长3.5--7厘米,径1-1.5毫米,先端尖,边缘有疏生细锯齿,仅腹面每侧有4-5条白色气孔线;横切面三角形,皮下层由单层细胞组成,树脂道2-3个,背面2个边生,有时腹面1个中生或无;叶鞘早落。球果柱状矩圆形或圆柱状卵形,通常单生,熟时淡红褐色,微具树脂,通常长4-9厘米,径3-6厘米,稀长达17厘米、径7厘米,梗长0.7-2厘米;种鳞楔状倒卵形,通常长2.5-3.5厘米,宽1.5-2.3厘米,鳞盾菱形,先端边缘较薄,微内曲或直伸;种子椭圆形或倒卵形,长8-12毫米,连同种翅与种鳞近等长。花期4-5月,球果第二年10月成熟。
分布(Distribution):为我国特有树种,产于湖南南部、贵州独山、广西、广东北部及海南五指山海拔700-1600米地带。
用途(Use):木材质较轻较软,结构较细密,具树脂,耐久用. 可供建筑、枕木、电杆、矿柱及家具等用材,亦可提取树脂。
引自中国植物志英文版FOC Vol. 4
Pinus kwangtungensis Chun & Tsiang, Sunyatsenia. 7: 113. 1948.
华南五针松 hua nan wu zhen song | Pinaceae  | Pinus
Trees to 30 m tall; trunk to 1.5 m d.b.h.; bark brown, scaly; 1st-year branchlets pale brown; old branchlets grayish brown or yellow-brown, glabrous, rarely puberulent; winter buds black-brown, slightly resinous. Needles 2-5 per bundle, triangular in cross section, 3.5-7 cm × 1-1.5 mm, vascular bundle 1, resin canals 2, marginal, sometimes also 1 median, base with sheath shed. Seed cones usually solitary, pedunculate (peduncle 0.7-2 cm), reddish brown at maturity, cylindric-oblong or cylindric-ovoid, 3-9(-17) × 1.5-7 cm, slightly resinous. Seed scales cuneate-obovate, 2.5-3.5 × 1.5-2.3 cm; apophyses rhombic, apex thin, straight or slightly incurved. Seeds ellipsoid or obovoid, 0.8-1.2 cm, together with wing subequal to seed scales. Pollination Apr-May, seed maturity Oct of 2nd year.
Hills, slopes, mountain ridges, summits; 500-1600 m. N Guangdong, SW Guangxi, S Guizhou, Hainan, S Hunan [Vietnam]
A vulnerable species in China. It has often been confused, and even united, with Pinus fenzeliana (to which the records from Hainan might belong); however, the two species are not considered here to be conspecific.
(责任编辑:徐晔春)
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