Stromanthe bahiensis sp. nov. (Marantaceae), endemic to southern Bahia State, Brazil

Abstract

Arns, Cond. Ville de Montagne, qd 2, c. 12, 71680-357, Lago Sul, DF, Brasil. Á S. J. Mayo, Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE, UK Á J. M. A. Braga (jmabraga@jbrj.gov.br), Instituto de Pesquisas Jardim Botânico do Rio de Janeiro. Rua Pacheco Leão, 915. 22460-030, Rio de Janeiro, RJ, Brasil. Stromanthe bahiensis Yoshida-Arns, Mayo & J. M. A. Braga sp. nov. (Marantaceae) is described as an endemic to the Atlantic Forest coast of southern Bahia State in Brazil. It is similar to S.hjalmarssonii (Körn.) Petersen, which is restricted to Central America, but differs from it by the following characteristics: petiole 14Á70 cm long, leaf blade oblong-ovate to ovate-lanceolate, fertile bracts 18Á30 )2Á4 mm, narrowly lanceolate to ovate-lanceolate, sepals 4Á6 mm long, corolla lobes 3.0Á3.5 mm long, outer staminodes 2.0Á3.5)1Á2 mm, pale bluish or purplish, callose staminode 2Á3 )1Á2 mm, cucullate staminode 2Á3 mm long and ovary hirsute. The new species is described and illustrated with diagnostic characters, taxonomic comments and remarks on its conservation status.

Stromanthe idroboi sp. nov. (Marantaceae) from the montane forests of Colombia and Venezuela

“…Stromanthe , with approximately 15 species, is a genus of the family Marantaceae. It is found in the rain forests of Brazil, southern Mexico, Central America, the Caribbean, Colombia, Venezuela, the Guianas, the Andean foothills of Ecuador, and the forested flood plains of Bolivia (Andersson 1998, Yoshida‐Arns et al 2011).…”

“…The genus has been circumscribed by a combination of richly branched aerial shoot system, antitropic orientation of the leaf blade, a usually diffuse or rarely congested inflorescence, deciduous and often colored bracts, absence of interphylls, absence of (or rudimentary) bracteoles, dolichoblastic flower pairs and short corolla tube (less than half the length of the corolla lobes) (Andersson 1981, 1998, Yoshida‐Arns et al 2002). However, the taxonomic position of Stromanthe is quite controversial and has been widely discussed since the 19th century (Yoshida‐Arns et al 2011).…”