Wikipedia:Articles for deletion/List of Rhododendron species
satsfies  both as a navigational index (not all links are red; there are articles on many species in this genus already) and as a "valuable information source" relevant to the genus Rhododendron by listing all species within that genus regardless of whether articles on all those species have or will soon be created. This also passes , which says redlinks are appropriate where the topics "should obviously have articles;" the point about not creating lists of redlinks before creating articles is for lists that have no inherent encyclopedic function aside from being a to do list for more articles. That isn't the case here
— User:Postdlf, 19:16, 4 November 2012 (UTC)
Stance: keep
Cited policy: WP:LISTPURP||WP:REDLINK (Wikipedia:Manual of Style)