<p>Este trabalho consiste no estudo taxonômico da Tribo Cassieae no Parque Ecológico Engenheiro Ávidos, Cajazeiras – Paraíba, realizado entre fevereiro/2017 a abril/2018. Foram registrados na área, 12 espécies, distribuídas em dois gêneros: Chamaecrista (6) e Senna (6). Dentre as espécies encontradas, destacam-se Chamaecrista pilosa, aqui citada como novo registro para o estado da Paraíba e as ocorrências de C. amiciella e C. duckeana, espécies endêmicas da Caatinga. Apresenta-se chave analítica para identificação das espécies, descrições morfológicas e informações complementares. Nesse contexto, evidencia-se a relevante contribuição deste estudo para o conhecimento da flora na região.</p><p><strong>Palavras chave</strong>: Caatinga, diversidade florística, Taxonomia vegetal, Fabaceae.</p>
<p>As subfamílias Cercidoideae e Detarioideae representam as linhagens basais dentre as Leguminosae. Neste trabalho é relatada a ocorrência de três espécies no Parque Ecológico Engenheiro Ávidos, sendo duas integrantes de Cercidoideae, Bauhinia cheilantha (Bong.) Steud. e B. pentandra (Bong.) D. Dietr. e uma de Detarioideae, Tamarindus indica L. Vale salientar que B. pentandra ocorre na Paraíba apenas nos municípios que compreendem a mesorregião do Sertão, enquanto B. cheilantha encontra-se distribuída em todas as regiões geográficas do estado, já Tamarindus indica é uma espécie exótica, amplamente cultivada, em função do seu potencial alimentício. Estes dados florísticos são relevantes, pois contribuem para a ampliação do conhecimento da cobertura vegetal no semiárido.</p><p><strong>Palavras chave</strong>: Caatinga, Florística, Fabaceae.</p>
Senna Mill. (Caesalpinioideae-Leguminosae) comprises approximately 350 species distributed in the Americas, Asia, Africa, Madagascar, Australia, and Pacific Islands. It is a taxonomically complex group and, for more than two centuries, Senna was considered part of Cassia L. The segregation of Cassia, belonging to the subtribe Cassiinae H.S. Irwin & Barneby, into three distinct genera (Cassia senso stricto, Chamaecrista [L.] Moench, and Senna) was based on floral and fruit morphologies. In this work we lectotypified ten names related to the Senna ser. Interglandulosae (Benth.) H.S. Irwin & Barneby (Cassia acuruensis Benth., C. aversiflora Herb., C. centijuga Wawra, C. holwayana Rose, C. huancabambae Harms, C. lindleyana Gardner, C. mutissiana Kunth, C. selloi G. Don, C. semifalcata Vell., and C. verrucosa Vogel) and designate an epitype for C. aversiflora.
Abstract— A new species of the genus Senna from the Atlantic Forest of Paraíba State, Brazil, is described and illustrated based on a field collection, traditional taxonomic methodologies, and the analysis of Senna collections at RB and the main herbaria in northeastern Brazil. Morphologically, Senna pluribracteata is related to a group of four species of Senna sect. Chamaefistula ser. Bacillares: S. macranthera, S. pinheiroi, S. rizzinii, and S. rugosa, although S. pluribracteata has a set of distinctive anatomical characters that differentiate it: two extrafloral nectaries between leaflets in the rachis; large and conspicuous elliptic bracts 7.0‐9.0 mm long along the inflorescence peduncle; the epidermis on the abaxial surface is conspicuously and compactly papillose; the rounded leaflet margins have palisade parenchyma near the apex; the mesophyll is dorsiventral with a single layer of palisade parenchyma, with isodiametric cells occupying approximately 60% of that structure; the petiole has a somewhat pentagonal shape and is planar adaxially; the rachis is obdeltoid and planar adaxially. Morphological and leaf anatomical descriptions, and a key to identifying the seven species of Senna ser. Bacillares found in Paraíba State are provided. The morphological and anatomical affinities of S. pluribracteata and its allied taxa are discussed.
Senna ser. Bacillares comprises approximately 50 species, 23 of which are found in Brazil. Micromorphological studies of the leaflet epidermis were performed on ten species of Senna ser. Bacillares collected in the Atlantic Forest north of the São Francisco River, in Northeastern Brazil, to identify qualitative and quantitative characters supporting their taxonomy. All species showed an uniseriate epidermis, hypostomatic leaflets, and more than one type of stomata (the paracytic type being predominant). Different types of epicuticular waxes were observed, including microplatelets as rosettes (characteristic of Fabaceae), fissured layers, and membranous platelets. A glabrous epidermis on both surfaces was characteristic of S. splendida, and disperse trichomes were observed on the abaxial surface of S. quinquangulata. Straight to curved anticlinal cell walls were observed in most species, the curved pattern was exclusive to S. quinquangulata and sinuous types on the abaxial surfaces of S. macranthera and S. splendida. A papillose epidermis on the abaxial surface was common to seven species. Four types of stomata were observed, including the anomotetracytic type, which has not been previously reported in Senna. Spherical crystals and crystal sand are reported here for Senna for the first time. Those sets of micromorphological characters provide additional subsidies for the taxonomy of Senna ser. Bacillares, as well as for the genus Senna.
Senna splendida (Vogel) H.S.Irwin & Barneby (Leguminosae) is a ethnomedicinal species native to Brazil, popularly known in the country as "fedegoso-grande and "feijão-brabo", it is used against kidney diseases, bronchitis, rheumatism, anemia and inflammations. A pharmacobotanical study of the aerial vegetative organs of S. splendida was carried out, looking for morphoanatomical data that can contribute to the taxonomy and quality control of its ethno-drugs. Paradermic sections of both epidermal surfaces and cross sections of the leaf and stem were made freehand. Histochemical tests were also performed to indicate the types of plant metabolites. Senna splendida is a sub-shrubby to shrubby, with cylindrical stems, leaves with 4-leaflets, sub-cylindrical petiole, leaflet blade are oblong MOL2NET,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.