Horstia Heist. Dataset GBIF Backbone Taxonomy Rank GENUS Published in Syst. 15 (1748) (Quid ?). Classification kingdom Plantae genus Horstia Name Homonyms Horstia Oudemans, 1905 Horstia J.Sieminska & B.Kwiecinska, 2002 Horstia Deland, Cameron, Rao, Ritter & Bullock, 2010 Horstia Heist.