退色血红杜鹃

Rhododendron sanguieum Franch. var. cloiophorum (Balf. f. et Forrest) Chamb. x Cullen et Chamb. in Not. Bot. Gard. Edinb. 37: 334. 1979; Chamb. in Not. Bot. Gard. Edinb. 39: 398. 1982; 西藏植物志3: 591. 1986.——R. cloiphorum Balf. f. et Forrest in Not. Bot. Gard. Edinb. 11: 37. 1919; Tagg in Stevenson, Spec. Rhodod. 644. 1930.——R. leucopetalum Balf, f. et Forrest in ibid. 11; 86. 1919.——R. asmenistum Balf. f. et Forrest in ibid. 13: 29. 1920. ——R. cloiophorum Balf. f. et Forrest subsp. asmenistum (Balf. f. et Forrest) Tagg in Stevenson, Spec. Rhodod. 545. 1930. ——R. cloiophorum Balf. f. et Forrest subsp. leucopetalum (Balf. f. et Forrest) Tagg in ibid. 545. 1930.——R. sanguineum Franch. subsp. cloiophoruin (Balf. f. et Forrest) Cowan in Not. Bot. Gard. Edinb. 20:71. 1940. ——R. sanguineum Franch. subsp. leucopetalum (Balf. f. et Forrest) Cowan in ibid. 20: 73. 1940.

本变种与原变种的区别在于花冠为白色或黄色带粉红色至粉红色。

产云南西北部和西藏东南部。生于海拔3 850-4 260米的岩坡上或高山灌丛中。模式标本采自云南西北部德钦。