Revisão taxonômica do gênero Riedeliella Harms (Leguminosae-Faboideae)

Abstract

O gênero Riedeliella Harms pertence à tribo Acosmieae Yakovl. (Leguminosae-Faboideae), representado por três espécies arbustivas, exclusivas da América do Sul. Os autores descrevem, ilustram, estabelecem o grau de afinidades entre as espécies e esclarecem a posição taxonômica do gênero. Uma chave dicotômica para a identificação das espécies e um mapa com a distribuição geográfica são apresentados. Sinonimiza-se o gênero Itaobimia Rizzini e propõe-se a nova combinação: R. magalhaesii (Rizz.) Lima & Vaz.

The realignment of Acosmium sensu stricto with the Dalbergioid clade (Leguminosae: Papilionoideae) reveals a proneness for independent evolution of radial floral symmetry among early­branching papilionoid legumes

“…In addition to Acosmium, Etaballia, and Inocarpus, the other genus with radial flowers is Riedeliella, an endemic of seasonally dry forests from eastern Brazil and Paraguay (Lima & Vaz, 1984). This genus differs from Acosmium in having staminal filaments joined into a tube, and fruits with an expanded circular wing (Lima & Vaz, 1984). Riedeliella is most closely related to Discolobium, which together form the earliest branching sister to the remaining genera of the Pterocarpus clade (Fig.…”

“…Such emphasis on radial floral symmetry obscured both the heterogeneous assemblage of species of Acosmium s.l. and lead Lima & Vaz (1984) to propose a close relationship of the genera Riedeliella and Etaballia with the tribe Acosmieae of Yakovlev (1972).…”

A molecular phylogeny of the vataireoid legumes underscores floral evolvability that is general to many early‐branching papilionoid lineages

“…Far from being an exception among the classification of flowering plant families, the classification of the ecologically and economically important Papilionoideae (Leguminosae) has long been influenced by the great emphasis placed on floral traits (e.g., Bentham, 1865; Arroyo, 1981; Polhill and Raven, 1981; Lima and Vaz, 1984; Polhill, 1994; Tucker and Douglas, 1994; Tucker, 1997). The highly specialized papilionate flowers in papilionoid legumes are typically distinguished from the mostly radial mimosoid and the generally bilaterally symmetrical, but nonpapilionate caesalpinioid flowers by having standard, wing, and keel petals clearly differentiated, stamens enveloping the ovary, and a strong bilateral symmetry that often involves a fusion of floral organs and limited access to the nectaries and pollen.…”

Composition of the Lecointea clade (Leguminosae, Papilionoideae, Swartzieae), a re­evaluation based on combined evidence from morphology and molecular data

“…Our morphological matrix is based on that of Herendeen (1995) with some modifications (for character 15 we included the state abaxial petal position variable infraspecifically; characters 25-29 are subdivided from the character 29 of Herendeen, 1995) and includes some additional characters (30)(31)(32)(33)(34)(35). Sources besides Herendeen (1995) include: Rizzini & Mattos-Filho (1977), Lima (1982), Mansano (1997), Mansano & Tozzi (1999a, b, 2001, and Sartori (2000). Character 3 (leaf or leaflet margin) varies in Zollernia ilicifolia, sometimes even in the same individual.…”