Roberto Manuel Salas

Sylvainia is a genus of flowering plants in the family Rubiaceae. It includes a single species, Sylvainia natalensis, a scrambling shrub or tree native to eastern and southeastern Africa, ranging from southern Tanzania through Malawi, Mozambique, Zambia, and Eswatini to Lesotho, KwaZulu-Natal, and the Northern Provinces of South Africa. The species was first described as Cephalanthus natalensis in 1881 by Daniel Oliver. In 2023 María Florencia Romero and Roberto M. Salas placed the species in the new monotypic genus Sylvainia.

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Planaltina is a genus of flowering plants in the family Rubiaceae. It includes four species native to Brazil, ranging from northern to west-central and southeastern Brazil. Planaltina angustata (Steyerm.) R.M.Salas, Cabaña Fader & E.L.Cabral – Goiás Planaltina capitata (K.Schum.) R.M.Salas & E.L.Cabral – Goiás and Brasília Planaltina lanigera (DC.) R.M.Salas & E.L.Cabral – Tocantins to Minas Gerais Planaltina myndeliana R.M.Salas & E.L.Cabral – Goiás

Carajasia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Carajasia cangae, which is found on the mountain summits of Serra dos Carajás (Pará, Brazil).

Sylvainia is a genus of flowering plants in the family Rubiaceae. It includes a single species, Sylvainia natalensis, a scrambling shrub or tree native to eastern and southeastern Africa, ranging from southern Tanzania through Malawi, Mozambique, Zambia, and Eswatini to Lesotho, KwaZulu-Natal, and the Northern Provinces of South Africa. The species was first described as Cephalanthus natalensis in 1881 by Daniel Oliver. In 2023 María Florencia Romero and Roberto M. Salas placed the species in the new monotypic genus Sylvainia.

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Planaltina lanigera is a species of flowering plant in the family Rubiaceae. It is a subshrub or shrub native to northern, west-central, and southeastern Brazil, ranging from Tocantins to Minas Gerais states.

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Paganuccia is a monotypic genus of flowering plants in the Rubiaceae family. The genus contains only one species, viz. Paganuccia icatuensis, which is endemic to the continental dunes in the São Francisco River basin, Bahia, north-eastern Brazil. Morphological and molecular phylogenetic analyses support the recognition of this new genus within the Spermacoce clade of the tribe Spermacoceae.

Leonoria is a genus of flowering plants in the family Rubiaceae. It includes a single species, Leonoria calcicola, which is endemic to Bahia state in northeastern Brazil. It grows only on limestone outcrops in seasonally dry tropical forests. The species was first described as Denscantia calcicola in 2012 by Roberto M. Salas and Elsa Leonor Cabral. In 2024 Mariela Nuñez Florentin et al. published a phylogenetic and morphological analysis which concluded that the species was distinct from other Denscantia species, with differences in inflorescence organization, style shape, fruit dehiscence,

Leonoria is a genus of flowering plants in the family Rubiaceae. It includes a single species, Leonoria calcicola, which is endemic to Bahia state in northeastern Brazil. It grows only on limestone outcrops in seasonally dry tropical forests. The species was first described as Denscantia calcicola in 2012 by Roberto M. Salas and Elsa Leonor Cabral. In 2024 Mariela Nuñez Florentin et al. published a phylogenetic and morphological analysis which concluded that the species was distinct from other Denscantia species, with differences in inflorescence organization, style shape, fruit dehiscence,

Januaria lombardii is a species of flowering plant in the family Rubiaceae. It is the sole species in genus Januaria. It a shrub endemic to northern Minas Gerais state in southeastern Brazil.

Januaria lombardii is a species of flowering plant in the family Rubiaceae. It is the sole species in genus Januaria. It a shrub endemic to northern Minas Gerais state in southeastern Brazil.

Diadorimia densifolia is a species of flowering plant in the family Rubiaceae. It is the sole species in genus Diadorimia. It is a perennial or subshrub native to the Serra do Cipó of Minas Gerais state in southeastern Brazil.

Diadorimia densifolia is a species of flowering plant in the family Rubiaceae. It is the sole species in genus Diadorimia. It is a perennial or subshrub native to the Serra do Cipó of Minas Gerais state in southeastern Brazil.

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