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头花杜鹃Rhododendron capitatum

时间:2013-09-09 11:35来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 头花杜鹃 学名( Scientific Name ): Rhododendron capitatum Maximowicz 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
中文名(Chinese Name):头花杜鹃
学名(Scientific Name):Rhododendron capitatum Maximowicz
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):常绿小灌木,高0.5-1.5米,分枝多,枝条直立而稠密。幼枝短,黑色或褐色,密被鳞片。叶芽鳞早落。叶近革质,芳香,椭圆形或长圆状椭圆形,长(7-)10-18(-24)毫米,宽(3-)5-10毫米,顶端圆钝,无短突尖,基部宽楔形,上面灰绿或暗绿色,被灰白色或淡黄色鳞片,相邻接或重叠,下面淡褐色,具二色鳞片,鳞片无色或禾秆色,黄褐色或暗琥珀色,数量约相等而混生,相邻接或稍有间距;叶柄长2-3毫米,被鳞片。花序顶生,伞形,有花2-5(-8)朵;花梗长1-3毫米,被微柔毛或鳞片;花萼带黄色,裂片5,不等大,膜质,长圆形或卵形,长3-6毫米,基部被疏毛或鳞片,边缘被睫毛;花冠宽漏斗状,长(10-)13-15(-17)毫米,淡紫或深紫,紫蓝色,外面不被鳞片,花管较裂片短,长3-5毫米,内面喉部密被绵毛,有时管外也有毛;雄蕊10,伸出,花丝近基部被毛,子房长约2毫米,被灰白色鳞片和微柔毛,花柱常较雄蕊长,近基部偶有毛。蒴果卵圆形,长3.5-6毫米,被鳞片。花期4-6月,果期7-9月。
分布(Distribution):产陕西、甘肃、青海及四川。生于海拔2500-4300米高山草原、草甸、湿草地或岩坡。
用途(Use):
引自中国植物志英文版FOC Vol. 14 Page 291      
Rhododendron capitatum Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg. 23: 351. 1877.
头花杜鹃 tou hua du juan | Apiaceae  | Rhododendron
Small shrubs, 0.5–(1.5) m tall; bud scales deciduous. Petiole 2–3 mm, scaly; leaf blade elliptic or oblong-elliptic, (0.7–) 1–1.8(–2.4) × (0.3–)0.5–1 cm; base broadly cuneate; apex rounded, not mucronate; abaxial surface pale brown, scales contiguous to slightly separated, 2-colored, pale yellow and dark brown or tan to dark amber, nearly equal in number and intermixed; adaxial surface pale or olive green, densely scaly. Inflorescence 2–5(–8)-flowered. Pedicel 1–3 cm, scaly; calyx yellowish, lobes 3–6 mm, oblong or ovate, unequal, persistent in fruit, pilose or scaly at base, margin ciliate; corolla broadly funnelform, pale purple to deep purple or bluish purple, (1–) 1.3–1.5(–1.7) cm, tube 3–5 mm, outer surface not scaly; throat pubescent; stamens 10, exserted, filaments pubescent towards base; ovary ca. 2 mm, scaly, pubescent; style slightly longer than stamens, occasionally pubescent towards base. Capsule ovoid, 3.5–6 mm, scaly, pubescent. Fl. Apr–Jun, fr. Jul–Sep.
Moist grasslands, alpine meadows, rocky slopes; 2500–4300 m. Gansu, Qinghai, Shaanxi, NW Sichuan.






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