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腋花杜鹃Rhododendron racemosum

时间:2013-09-09 11:47来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 腋花杜鹃 学名( Scientific Name ): Rhododendron racemosum Franch. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Rhododendron motsouense H. Lv. Rhododendron crenatum H. Lv
中文名(Chinese Name):腋花杜鹃
学名(Scientific Name):Rhododendron racemosum Franch.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Rhododendron motsouense H. Lév.  Rhododendron crenatum H. Lév.
科属(Family & Genus):杜鹃花科(Ericaceae)杜鹃属
形态特征(Description):小灌木,高0.15-2米,分枝多。幼枝短而细,被黑褐色腺鳞,无毛或有时被微柔毛。叶片多数,散生,揉之有香气,长圆形或长圆状椭圆形,长1.5-4厘米,宽0.8-1.8厘米,顶端钝圆或锐尖,具明显的小短尖头或不明显具有,基部钝圆或楔形渐狭,边缘反卷,上面密生黑色或淡褐色小鳞片,下面通常灰白色,密被褐色鳞片,鳞片中等大小,近等大,相距不超过其直径也不相邻接,侧脉在两面均不明显,网脉在上面明显或不显,在下面不明显;叶柄短,长2-4毫米,被鳞片。花序腋生枝顶或枝上部叶腋,每一花序有花2-3朵;花芽鳞多数覆瓦状排列,于花期仍不落;花梗纤细,长0.5-1厘米,密被鳞片;花萼小,环状或波状浅裂,被鳞片;花冠小,宽漏斗状,长0.9-1.4厘米,粉红色或淡紫红色,中部或中部以下分裂,裂片开展,外面疏生鳞片或无;雄蕊10,伸出花冠外,花丝基部密被开展的柔毛;子房5室,密被鳞片,花柱长于雄蕊,洁净,或有时基部有短柔毛。蒴果长圆形,长0.5-1厘米,被鳞片。花期3-5月。
分布(Distribution):产四川、贵州、云南。生于海拔1500--3800米松林、松栎林下,灌丛草地或冷杉林缘。
用途(Use):
引自中国植物志英文版FOC Vol. 14 Page 326
Rhododendron racemosum Franchet, Bull. Soc. Bot. France. 33: 235. 1886.
腋花杜鹃 ye hua du juan  | Apiaceae  | Rhododendron
Rhododendron crenatum H. Léveillé; R. motsouense H. Léveillé ["motsonense"].
Small, much-branched shrubs, 0.15–2 m tall; young branches short and slender, brown glandular scaly, otherwise glabrous or somewhat velutinous. Petiole short, 2–4 mm, scaly; leaf blade fragrant, oblong to elliptic, 1.5–4 × 0.8–1.8 cm; base cuneate or rounded; margin revolute; apex obtuse or acuminate, apiculate or not; abaxial surface usually gray-white, scales less than 1 × their own diameter apart, not contiguous, medium sized, brown; adaxial surface densely brown scaly. Inflorescence axillary or subterminal, 2- or 3-flowered; bud scales many, imbricate, persistent until flowering time. Pedicel slender, 0.5–1 cm, densely scaly; calyx discoid, slightly serrulate, minute, scaly; corolla widely funnelform, divided from below or at middle, pink or purple, 0.9–1.4 cm, outer surface sparsely scaly, lobes spreading; stamens 10, exserted, filaments pilose at base; ovary 5-locular, densely scaly; style longer than stamens, glabrous or shortly pilose at base. Capsule cylindric, 5–10 mm, scaly. Fl. Mar–May.
Pinus or Quercus forests, Abies forest margins, grasslands, usually dominant; 1500–3500(–3800) m. NW Guizhou, SW Sichuan, Yunnan.
Rhododendron ×fittianum I. B. Balfour (Notes Roy. Bot. Gard. Edinburgh 10: 108. 1917), described from Yunnan, was considered to be an obscure hybrid of R. racemosum by Cullen (Notes Roy. Bot. Gard. Edinburgh 39: 113–114. 1980).





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