Three new species of Peltaea (Malvaceae, Malvoideae) from the cerrado of Brazil

Abstract

Three new species of Peltaea are described from the cerrado of Brazil: P. brasiliana from Distrito Federal, P. rupestris from the state of Minas Gerais and P. stellata from the state of Tocantins. Illustrations, comments on morphology, taxonomic relationships, and phenology are provided, as well as assessments of conservation status of the new species.

Redescription and extended geographical distribution of Peltaea chiquitana (Malvaceae, Malvoideae)

“…Peltaea chiquitana is characterized by the rusty-yellow indumentum on the branches with stellate trichomes, red corolla, cylindrical column, slightly enlarged at the base, and by its slightly rounded and winged mericarps. The remaining species of the genus have corolla entirely yellow, or with an orange darker spot at base or ranging from pink to white with a darker spot yellow, reddish or vinaceous at base (Krapovickas & Cristóbal 1965;Fryxell 1985;Fernandes-Júnior & Esteves 2016). This species can be readily assigned to the morphologically similar group composed of P. riedelii (Gürke) Standl.…”

“…Fernandes-Jr. & G.L. Esteves mainly due its lanceolate to elliptical leaf blades, foliaceous bracts, and solitary flowers and/or in arranged terminal reduced (capituliform) racemes, always subtended by foliaceous bracts (P. chiquitana, rarely presents solitary flowers in the leaf axils), and glabrous seeds (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016). Diagnostic characters differentiating P. chiquitana and morphologically similar species are presented in the Table 1.…”

“…Peltaea is a Neotropical genus of Malvaceae comprising 19 species (Fernandes-Júnior & Esteves 2016). The genus is represented by 13 species in Brazil, out of which eight are endemic, occurring especially in the Cerrado domain, the genus' center of diversity (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016).…”

“…Peltaea is a Neotropical genus of Malvaceae comprising 19 species (Fernandes-Júnior & Esteves 2016). The genus is represented by 13 species in Brazil, out of which eight are endemic, occurring especially in the Cerrado domain, the genus' center of diversity (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016). The genus can be characterized by the epicalyx bracteoles, morphologically and anatomically, differentiated in pedicel and blade, and by the chromosome numbers 2n = 50 or 2n = 100 (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016).…”

“…The genus is represented by 13 species in Brazil, out of which eight are endemic, occurring especially in the Cerrado domain, the genus' center of diversity (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016). The genus can be characterized by the epicalyx bracteoles, morphologically and anatomically, differentiated in pedicel and blade, and by the chromosome numbers 2n = 50 or 2n = 100 (Krapovickas & Cristóbal 1965;Fernandes-Júnior & Esteves 2016). Despite having already been taxonomically revised by Krapovickas & Cristóbal (1965), many taxonomic problems persist to this day, especially regarding the distribution and delimitation of many taxa, due to the limited number of herbarium specimens analyzed by these authors.…”