João Renato Stehmann

Petunia exserta is a rare member of the genus Petunia, endemic to the Serras de Sudeste in southern Brazil. First described in 1987, only fourteen plants were found in the wild during an expedition in 2007. In the wild, the plant is found growing only in shaded cracks on sandstone towers. It is the only Petunia species that is naturally pollinated by hummingbirds, and the only naturally red flowered Petunia species.

Solanum evolvuloides is a species of Solanum, which was first described in 2011 by Giacomin & Stehmann. Solanum evolvuloides belongs to section Gonatotrichum, a small group assigned to the Brevantherum clade of the genus Solanum. It resembles Solanum turneroides Chodat, sharing with it heterandry, and Solanum parcistrigosum Bitter, with which it shares a similar habit and pubescence. Despite these similarities, the species can be recognized by its ovate-elliptic to cordiform leaf shape and more membranaceous leaf texture than the other species in the section, and stem, inflorescence axes, and

Nicotiana mutabilis, the colour-changing tobacco plant or flowering tobacco plant, is a species of flowering plant in the family Solanaceae. It is native to northeastern Rio Grande do Sul state in Brazil, and it has been introduced to Great Britain. An erect annual or biennial reaching 1.5 m (5 ft), its flowers start out white and fade to pink and finally dark pink. It is available from commercial suppliers.

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Calibrachoa elegans is a plant species in the genus Calibrachoa found in Minas Gerais in Brazil.

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