Rhododendron augustinii Hemsl. subsp. chasmanthum (Diels) Cullen f. hardyi (David.) R. C. Fang (Ericaceae)
(2) 白花张口杜鹃(变型)(云南植物研究)
名称文献:Rhododendon augustinii Hemsl. subsp. casmanthum (Diels) Cullen f. hardyi (Davidian) R. C. Fang in Act. Bot. Yunn. 4(3): 255. 1982;云南植物志4: 491. 1986. —R. hardyi Davidian in Rhodod. with Magn. and Cam. 46-47. 1974. —R. augustinii subsp. hardyi (Davidian) Cullen in Not. Bot. Gard. Edinb. 36: 109. 1978.
形态特征:本变型的特征为花冠白色,内面基部有淡黄或淡绿色斑点;落叶。产云南西北部及毗邻的西藏察瓦龙。生于海拔3300—3700米的云杉林。模式标本采自云南德钦(茨姑)。