Sorghastrum rigidifolium (Stapf) Chippin. ex Pole-Evans Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Sorghastrum species Sorghastrum stipoides Name Homonyms Sorghastrum rigidifolium Swallen Sorghastrum rigidifolium (Stapf) Chippind. Sorghastrum rigidifolium (Stapf) Chippin. ex Pole-Evans