Agrostis effusa Spreng. Dataset GBIF Backbone Taxonomy Rank SPECIES Published in Syst. Veg., 1: 260 (1824) Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Apera species Apera spica-venti Name Homonyms Agrostis effusa Spreng. Agrostis effusa Gray, 1821 Agrostis effusa (L.) Lam.