Deble, L. P. & F. S. Alves (2013). Herbertia amabilis Deble & F. S. Alves (Iridaceae), a new species from Brazil. Candollea 68: 133–137. In English, English and French abstracts.
A new species, Herbertia amabilis Deble & F. S. Alves (Iridaceae), is described and illustrated from Rio Grande do Sul State, Brazil. Herbertia Sweet is a predominately South American genus, now comprising 8 species with 7 of them occurring in southern Brazil. Herbertia amabilis is closely related with Herbertia lahue subsp. amoena (Griseb.) Goldblatt, but can be distinguished principally by robust habit, narrowly linear leaves, style arms recurved at the apex, and smaller obovate-clavate ovary. With just two known populations occurring in central Rio Grande do Sul State, with an extent of occurrence comprised in less than 100 km2 and the populations size being smaller than 10 km2 the new species is preliminary considered as critically endangered. The geographic distribution of the new species is presented as well as the key for the Brazilian species of Herbertia.