Houstonia pusilla f. albiflora Standl. Dataset Rank FORM Published in Rhodora 34: 177 (1932) Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Houstonia species Houstonia pusilla Name Homonyms Houstonia pusilla f. albiflora (Millsp.) Fosberg Houstonia pusilla f. albiflora Wunderlin & W.E.Hopkins, 1966 Houstonia pusilla f. albiflora Standl.