A synopsis of the genus Poecilanthe (Leguminosae, Papilionoideae, Brongniartieae)

Abstract

RESUMO(Sinopse do gênero Poecilanthe (Leguminosae, Papilionoideae, Brongniartieae)) Este trabalho apresenta um tratamento sintético para as 10 espécies do gênero Poecilanthe (P. amazonica, P. effusa, P. falcata, P. grandiflora, P. hostmannii, P. itapuana, P. ovalifolia, P. parviflora, P. subcordata e P. ulei), incluindo uma chave de identificação e a revisão da nomenclatura e distribuição geográfica. Além disso, a delimitação das espécies é brevemente discutida. Desta forma, P. grandiflora e P.falcata são consideradas espécies distintas; P. parviflora var. floribunda é considerada sinônimo da variedade típica; e quatro lectótipos são designados. Palavras-chave: Brongniartieae, Leguminosas, América do Sul, taxonomia. ABSTRACT(A synopsis of the genus Poecilanthe (Leguminosae, Papilionoideae, Brongniartieae)) This work presents a synoptic treatment for the 10 species of Poecilanthe (P. amazonica, P. effusa, P. falcata, P. grandiflora, P. hostmannii, P. itapuana, P. ovalifolia, P. parviflora, P. subcordata and P. ulei), including an identification key, nomenclatural revision and their updated geographic distribution data. In addition, species delimitation is briefly discussed. Poecilanthe grandiflora and P. falcata have been revised and are considered to be distinct species; P. parviflora var. floribunda is considered to be a synonym of the typical variety; and four lectotypes are designated.

Tabaroa, a new genus of Leguminosae tribe Brongniartieae from Brazil

“…The extensive sampling carried out by Meireles (2007) revealed that Poecilanthe in its broadest sense is not monophyletic and should be divided into three genera. Poecilanthe sensu stricto consistently has resting buds present in the leaf axils, leaflets alternate and mostly stipellate, flowers pedicellate in short racemes, or few-branched panicles, the ovary stipitate, 3 -7ovulate and fruits dehiscent and mostly oblong to oblanceolate (suborbicular only in P. parviflora).…”

“…Tabaroa is distinguished from Poecilanthe sensu stricto by the absence of resting buds, leaflets opposite and exstipellate, flowers sessile in short, many-branched panicles, the ovary sessile, 2-ovulate, fruits indehiscent and suborbicular. A second Poecilanthe group recognised by Meireles (2007) includes P. effusa (Huber) Ducke and P. ovalifolia Kleinhoonte and is immediately distinguished from Tabaroa by the very elongate, laxly flowered inflorescences, pedicellate flowers, and fruits internally septate due to a proliferation of inter-seminal papery tissue. The third group of Poecilanthe species includes P. amazonica (Ducke) Ducke and P. hostmannii (Benth.)…”

“…The third group of Poecilanthe species includes P. amazonica (Ducke) Ducke and P. hostmannii (Benth.) Amshoff and, as in Cyclolobium, has unifoliolate leaves and a long stipitate ovary (Meireles 2007).…”

“…Cyclolobium is currently considered to be monospecific (Warwick & Pennington 2002). Poecilanthe currently comprises ten species (Meireles & Tozzi 2007), but a recent phylogenetic study does not support its monophyly (Meireles 2007).…”

Seed and embryo morphology ofPoecilanthe(Fabaceae, Papilionoideae, Brongniartieae)

“…The genus Poecilanthe (Fabaceae, Papilionoideae, Brongniartieae), established by Bentham (1860), comprises ten South American species distributed from Colombia and French Guiana to East Argentina and Uruguay (Meireles & Tozzi, 2007). Poecilanthe species are shrubs or trees occurring in a wide range of habitats, such as flooded and non‐flooded Amazonian forest, Atlantic rain forest, savannah (cerrado) and seasonally dry forests, including caatinga and restinga.…”