Abstract: Species R.araiophyllo Balf. f. et W.W Smith affinis,sed foliis valde angustis, subtus costa glabra, pedicellis sparse glandula,breviter stipitalos gerentibus, filamentis basi versus sparse pubbrulis vel glabrescentibus differt. Frutex, ramulis 3 -5 mm. crassis, hornotinis puberulis, demum glabris. Folia tenuiter coriacea, falcato-lanceolata vel angusto-lanceolata, 5.5-7.5 cm. longa, 1.3-1.7 cm. lata, apice acumine acuminata, margine. paulo crispa,basi cuneata vel late cuneata, supra viridia, glabra,costa impressa, nervis lateralibus utrinsecus circ. 10-jugis, leviter impressis, subtus glabra, glauca, minime rubo-punctata, costa elevata, nervis lateralibus leviter pro- minentis; petiolo 0.8-1.3 cm. longo, glabro, supra sulcato. Inflorescentia Yacemoso-umbellata circ. 9-flora, rhachi circ.

Key words: new taxa, genus, rhododendron, Yunnan, Sichuan

摘要： 灌木；小枝粗3—5毫米。幼校被微柔毛，后变无毛。叶薄革质，镰状披针形或狭披针形，略偏斜，长5.5—7.5厘米，宽1.3-1.7厘米，先端渐尖，具细尖头．基部楔形至阔楔形，边缘略呈皱波状，叶面绿色，无毛。中脉凹陷，侧脉约10对，微凹、叶背无毛，苍白色，具细小红色点，中脉隆起，侧脉略突，叶柄长0.8—1.3厘米，无毛、上面略具槽。花序总状伞形，约9朵花；花序轴长约1.5厘米，被灰白色绒毛。苞片早落，花梗长约1.1厘米，疏生小腺体；花萼短杯状，长约1．5毫米，裂片5，无毛，边缘具睫毛，花冠钟形，长3.5—4厘米，宽约3厘米，白色，5裂，裂片长约1.5厘米，宽约2厘米，先端微凹，其中 1个裂片具细小紫色斑点；雄蕊10，不等长，长2.2—2.g厘米，花丝基部疏生微柔毛或近无毛，子房狭圆锥形，密被绒毛，花柱长约3厘米，无毛，柱头头状。果未见。

关键词: 滇川, 杜鹃属, 类群