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折萼杜鹃 zheedujuan

被子植物门 Angiospermae
双子叶植物纲 Dicotyledoneae
合瓣花亚纲 Sympetalae
杜鹃花目 Ericales
杜鹃花科 Ericaceae
杜鹃属 Rhododendron
相关名称 Common Names
拉丁名
Rhododendron auritum Tagg
中文名
折萼杜鹃
拼音
zheedujuan
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描述 Description

124.折萼杜鹃(西藏植物志)

Rhododendron auritum Tagg in Rhodod. Soc. Not. 3: 278. 1930; id. in Not. Bot. Gard. Edinb. 18: 218. 1934; Cullen in ibid. 39: 128. 1980; Davidian, Rhodod. Spec. 1: 316. 1982; 西藏植物志3: 644. 1986.

常绿灌木,高1-3米。茎皮古铜红褐色,光滑无毛,片状剥落。叶革质,长圆形、披针形或长圆状披针形,长2.5-6.5厘米,宽1-2.7厘米,顶端钝或急尖,具短尖头,基部钝或楔形,上面绿色,有光泽,被鳞片,下面苍白色,密被鳞片,鳞片大小极不相等,小鳞片多数,褐色至暗褐色,相距为其直径或小于直径,多少邻接或重叠,大鳞片散生;叶柄长5-8毫米。花序顶生或腋生于枝端成伞形,有花4-7朵;花梗长0.5-1.3厘米,密被鳞片;花萼长3-5毫米,5深裂,裂片长圆形,卵形或近圆形,外面及边缘被鳞片,无缘毛;花冠管状钟形,长1.8-2.5厘米,乳黄色或乳白色、5裂,裂片有淡红晕或硫磺色,外面被鳞片;雄蕊10,不等长,与花冠近等长,花丝下部被毛;子房5室,密被鳞片,花柱细长,与花冠等长或稍长,中下部被鳞片。蒴果长圆状卵形,长8-10毫米,密被鳞片,花萼宿存。花期4-6月,果期7-9月。

产西藏东南部(雅鲁藏布江峡谷)。生于片麻岩的峭壁或砾石中,海拔2150-2 600米。模式标本采自米林(白马狗雄)。

知识共享:署名-非商业性使用-禁止演绎 1999《中国植物志》第57(1)卷 141页 PDF

Shrubs, evergreen, 1–3 m tall; stem and branches coppery red, with brown, smooth, flaking bark. Petiole 5–8 mm, scaly; leaf blade leathery, oblong, lanceolate or oblong-lanceolate, 2.5–6.6 × 1–2.7 cm; base obtuse or cuneate; apex acute or obtuse, mucronate; abaxial surface pale glaucous-green, scales overlapping to 0.5 × their own diameter apart, unequal, smaller scales more numerous, brown or dark brown, larger scales scattered; adaxial surface green, shiny, scaly. Inflorescence terminal or axillary, umbellate, 4–7-flowered. Pedicel 0.5–1.3 cm, densely scaly; calyx lobes 3–5 mm, rounded, ovate or oblong, reflexed, persistent in fruit, scaly abaxially, margin not ciliate; corolla tubular-campanulate, pale yellow to cream, sometimes with a slight tinge of pink on lobes, (1.8–)2–2.5 cm, outer surface scaly; stamens 10, ca. as long as corolla, filaments pubescent towards base; ovary densely scaly; style slender, as long as or longer than corolla, basal 1/3–1/2 scaly, otherwise glabrous. Capsule cylindric-ovate, 8–10 mm, densely scaly. Fl. Apr–Jun, fr. Jul–Sep.

Valleys, open stony banks, sheltered cliffs; 2100–2600 m. SE Xizang.

知识共享:署名-非商业性使用-禁止演绎 FOC Vol.14PDF
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