Crassula alpestris Drège Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Saxifragales family Crassulaceae genus Crassula species Crassula exilis Name Homonyms Crassula alpestris L.f. Crassula alpestris Thunb. Crassula alpestris Harv. Crassula alpestris Drège