De Macrocarpaeae Grisebach (ex Gentianaceis) Speciebus novisX: A Synopsis of the Genus in Montane Atlantic Forests of Brazil

Abstract

Abstract. Outside of the principal distribution and major diversification of Macrocarpaea in the Andes, smaller groups of species are found in the Greater Antilles of the Caribbean, Mesoamerica, the Guayana Highlands, and montane Atlantic forests of Brazil. Here, a complete revision of the genus in the latter region is presented recognizing eight species that correspond to the entirety of Macrocarpaea sect. Tabacifoliae:nov., and M. rubra Malme. These species occur primarily in humid coastal montane rainforests (Mata Atlântica), and two species also occur in campos rupestre montane savannas.Keywords: Macrocarpaea, Gentianaceae, Helieae, Brazil, Mata AtlânticaThe following herbaria are acknowledged for the loan of material, photocopies of specimens, data on their collections, and/or for hospitality extended during visits* by JRG to examine material of Macrocarpaea: AAU,

Foliar colleters inMacrocarpaea obtusifolia(Gentianaceae): anatomy, ontogeny, and secretion

“…Macrocarpaea obtusifolia (Griseb.) Gilg is found in Atlantic forests and high-altitude fields in southeastern Brazil (Grant and Trunz 2011), and during the collections, an abundant sticky secretion was observed at the base of leaves. Given this observation, it has been hypothesized that this secretion is produced by colleters because these structures are one of the synapomorphies of Gentianales.…”

“…Gilg is the fourth largest genus of Gentianaceae and the largest of the tribe Helieae , with most species only having been described recently Struwe 2001, 2003;Grant 2003Grant , 2004Grant , 2005Grant , 2007Grant , 2008Grant and Weaver 2003). The genus has a Neotropical distribution , with eight species in Brazil that are endemic to the Amazon, the Atlantic forest, and the Cerrado (Grant and Trunz 2011;Guimarães et al 2012). Macrocarpaea obtusifolia (Griseb.)…”

Flora da Bahia: Gentianaceae

“…Um número reduzido de espécies também é encontrado nas Ilhas do Caribe, na Mesoamérica, em terras altas da Guiana, e na Mata Atlântica brasileira (Grant & Trunz 2011). Suas espécies ocorrem preferencialmente em áreas florestais, mas duas espécies ocorrem nos campos rupestres.…”

“…Também é caracterizada pela inflorescência em tirsos laxos e grandes, com ramos longos, terminados em cimeiras menores, com flores pequenas em relação ao tamanho total da inflorescência (Grant & Trunz 2011). 7.4. Macrocarpaea illecebrosa J.R. Grant, Harvard Pap.…”

“…Das espécies que ocorrem no Brasil, é a encontrada em altitudes mais elevadas (Grant & Trunz 2011). E6, F5/6: campos rupestres, floresta estacional.…”