Heterosoma Guill. Dataset GBIF Backbone Taxonomy Rank GENUS Published in Arch. Bot. (Paris) i. (1833) 550. Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Campanulaceae genus Heterosoma Name Homonyms Heterosoma Schaum, 1844 Heterosoma Bernhauer, 1903 Heterosoma Mast, 1910 Heterosoma Guill.