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窄叶杜鹃Rhododendron araiophyllum

时间:2013-09-09 12:12来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 窄叶杜鹃 学名( Scientific Name ): Rhododendron araiophyllum Balf. f. et W. W. Smith 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): 科属( Family Genus ): 杜鹃花科(Eric
中文名(Chinese Name):窄叶杜鹃
学名(Scientific Name):Rhododendron araiophyllum  Balf. f. et W. W. Smith
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):
科属(Family & Genus):杜鹃花科(Ericaceae)杜鹃属
形态特征(Description):灌木,高约2-7米;枝条细瘦,幼枝绿色,微被柔毛;老枝灰白色,无毛。叶多密生于枝顶,约6-12枚,薄革质,椭圆状披针形,长约5-11厘米,宽约2-3厘米,先端渐尖。有短尖尾,基部楔形,中部最宽,边缘微呈波状皱缩,上面光滑无毛,中脉下陷有浅沟纹,侧脉15-16对,不显明,下面中脉显著隆起,幼时被薄绵毛,以后脱落,其余无毛,侧脉微凸起;叶柄圆柱状,长约1厘米,常无毛。总状伞形花序,有花5-10朵,总轴细长,长约1-1.5厘米,有淡黄色柔毛;花梗长1-1.5厘米,无毛;花萼小,盘状,常5裂,裂片三角形,长约1毫米;花冠钟状,长2.5-3.5厘米,淡玫瑰色至白色,有红色斑点,常5裂,稀6裂,裂片近于圆形,长约1.3厘米,宽约1.5厘米,顶端有凹缺;雄蕊10-12,花丝细瘦,仅基部有微柔毛;雌蕊长达3-3.5厘米;子房圆柱状锥形,长5-6毫米,直径2.5毫米,基部有时微被短柔毛,其余无毛,花柱细长,长2.5-3厘米,无毛,柱头微膨大。蒴果小,圆柱状,长1-1.5厘米,直径4毫米,无毛,成熟后顶端常6-7裂,花柱宿存。花期4-5月,果期10-11月。
分布(Distribution):产云南西部。生于海拔2600-3400米的冷杉林缘、灌木丛中。缅甸东北部也有。
用途(Use):
引自中国植物志英文版FOC Vol. 14 Page 364
Rhododendron araiophyllum I. B. Balfour & W. W. Smith, Trans. Bot. Soc. Edinburgh. 27: 184. 1917.
窄叶杜鹃 zhai ye du juan | Apiaceae  | Rhododendron
Shrubs, 2–7 m tall, older branches glabrous; branchlets slender; young shoots glabrescent. Petiole cylindric, ca. 10 mm, glabrescent; leaf blade subleathery, elliptic-lanceolate or narrowly lanceolate, broadest above middle of blade, 5–11 × 1.3–3 cm; base cuneate; margin undulate; apex acuminate or cuspidate; abaxial surface glabrous except sometimes for densely woolly midrib; adaxial surface glabrous, midrib conspicuously raised abaxially, grooved adaxially; lateral nerves 15–16-paired, obscure. Inflorescence racemose-umbellate, 5–10-flowered; rachis slender, 10–15 mm, woolly. Pedicel 1–1.5 cm, sparsely woolly; calyx lobes 5, 1–2 mm, rounded, glabrous to sparsely ciliate; corolla open-campanulate, fleshy, milky white to rose, with basal blotch, sometimes with purple flecks, 2.5–3.5 cm; lobes 5(or 6), suborbicular, ca. 1.3 × 1.5 cm, emarginate; stamens 10–12, 1.4–2.8 cm, filaments slender, pubescent at base; ovary conoid-cylindric, 5–6 × ca. 2.5 mm, 5- or 6-locular, pubescent at base; style glabrous, stigma slightly swollen. Capsule oblong-cylindric, 10–15 × ca. 4 mm, glabrous. Fl. Apr–May, fr. Oct–Nov.
Pinus forest margins, thickets; 1900–3400 m. NE and W Yunnan [NE Myanmar].




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