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红晕杜鹃Rhododendron roseatum Hutch.

来源：花匠小妙招时间：2024-11-20 04:04

红晕杜鹃Rhododendron roseatum Hutch.

别名：白玫瑰杜鹃;

科名：杜鹃花科 Ericaceae

属名：杜鹃属 Rhododendron

《中国植物志》第57(1)卷044页
  29．红晕杜鹃（云南植物志）图版11：3-4
  Rhododendron roseatum Hutch. in Not. Not. Gard. Edinb. 12: 57. 1919; id. in Stevenson, Spec. Rhodod. 473. 1930; Sleumer in Blumea, Suppl. IV. 44. 1958. pro syn., sub nom. R. ciliicalyx; Cullen in Not. Bot. Gard. Edinb. 39: 51. 1980; Davidian, Rhodod, Spec. 1: 250. 1982; 云南植物志4: 482. 图版128. 5-6. 1986.——R. lasiopodum Hutch. in ibid. 12: 58. 1919; Sleumer in Blumea, Suppl. IV. 43. 1958.
  灌木，高1.2-3米，有时成小乔木，高达4米。幼枝淡褐色，疏被鳞片。叶聚生枝条上部，卵形，长6-10厘米，宽2-4.5厘米，顶端三角状锐尖，偶或渐尖，具短尖头，基部钝圆至阔楔形，幼叶上面密被褐色鳞片，以后渐脱落，下面略呈灰白色，密被褐色或褐红色鳞片，鳞片不等大，相距不超过其直径或相邻接，偶有相距为其直径，中脉在上面略下陷，在下面凸起，侧脉6-8对，纤细，在两面均不明显，叶柄长0.5-1.2厘米，疏生鳞片，幼时两侧疏生粗毛。顶生伞形花序有花2-4；花梗长1-2厘米，密被鳞片，基部密被灰白色短茸毛，花梗自此断落；花萼不发达，外面密被鳞片，波状5裂，边缘密生长睫毛，偶而近无毛；花冠芳香，宽漏斗状，长5.5-7厘米，于蕾期粉红色，花开后白色带淡红色晕，5裂至花冠中部，裂片圆形，外面疏或密生鳞片，筒部被灰白色微柔毛；雄蕊10，不等长，长达花冠裂片中部，花丝下部被柔毛；子房6室，密被鳞片，花柱与花冠近等长，下部被鳞片。蒴果长圆状卵形，长约1.5厘米，密被褐色鳞片。花期5-7月。
  产云南腾冲、碧江。生于常绿阔叶林下、山坡阳处，山脊林内或岩石上灌丛中，海拔2 000-3 000米。模式标本采自云南西部（龙川江一怒江分水岭）。

《Flora of China》 Vol. 14 (2005)
Rhododendron roseatum Hutchinson
红晕杜鹃 hong yun du juan
Shrubs, sometimes small trees, 1.2–3(–4) m tall; young shoots pale brown, sparsely scaly. Petiole 5–12 mm, sparsely scaly; leaf blade ovate, 6–10 × 2–4.5 cm; base obtuse, rounded or broadly cuneate; apex triangular, acute, or acuminate, apiculate; abaxial surface pink green, gray-white, scales less than 1 × their own diameter apart to nearly contiguous, rarely 1 × their own diameter apart, unequal, brown or brownish red; adaxial surface densely brown scaly when young; midrib flat raised abaxially, slightly concave adaxially; lateral veins 6–8-paired, thin, inconspicuous on both sides. Inflorescence terminal, umbellate, 2–4-flowered. Flowers fragrant. Pedicel 1–2 cm, densely scaly; base gray-white-pubescent; calyx undeveloped, lobes 5, densely scaly; corolla broadly funnelform, 5-lobed to the middle, pinkish in bud, white tinged with pale red at anthesis, 5.5–7 cm, tube gray-white-pubescent, lobes rounded, densely scaly; stamens 10, unequal, half as long as corolla lobes; filaments pubescent below; ovary 6-locular, densely scaly; style as long as corolla, basal part scaly. Capsule cylindric-ovoid, ca. 15 mm, densely brown-scaly. Fl. May–Jul.
Evergreen broad-leaved forests, forests on hilltops, open slopes, rocks; 2000–3000 m. Yunnan [NE Myanmar].