Fabaceae - Senegalia velutina (DC.) Seigler & Ebinger - unha de gato -

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Inflorescência espiga (f. 1)

Flores séssis (f. 2)

Cálice e corola tubulosos, flores polistêmones (f. 3)

Inflorescência em botão (f. 4)

Botões com prefloração valvar (f. 5)

Inflorescência composta de espigas (f. 6)

Espiga com botões florais (f. 7)

Legume típico linear, margem das valvas proeminentes (f. 8)

Frutos estipitados, epicarpo coberto de indumento (f. 9)

Semente elíptica, testa lisa, pleurograma fechado (f. 10)

Funículo longo (f. 11)

Legume típico (f. 12)

Folha bipinada (f. 13)

Ramo lenhoso, costado, armado com acúleos (f. 14)

Ramo jovem clorofilado (f. 15)

Folha paripinada, 6 pares de folíolos (f. 16)

Glândula séssil no ápice do pulvino (f. 17)

Glândula oblonga (f. 18)

Liana (f. 19)

Leguminosae, Clado Mimosoide, Mimosoideae, Acacieae, Senegalia Raf. 279 espécies (w3tropicos 2021)

No Brasil ocorrem 60 espécies das quais 35 são endêmicas (Morim e Barros 2015).

Senegalia Raf.

Árvores ou lianas, ramos cilíndricos ou costados, armados. Estípula caduca ou persistente, basifixa. Folhas alternas-espiralada, bipinadas, multijugas com nectário no pecíolo, raque ou ambos; pecíolo menor que a raque. Inflorescência axilar, glomérulo ou espiga. Flores sésseis, pentâmeras, actinomorfas, monoclinas, hipóginas, cálice gamossépalo, lacínios 5; corola gamopétala, tubulosa, pétalas 5; androceu dialistêmone, polistêmone, estames numerosos, vistosos, gineceu simples, unicarpelar, unilocular, ovário súpero, séssil, pluriovulado. Fruto legume, linear, rufo. Sementes com testa lisa, pleurograma aberto.

Senegalia velutina (DC.) Seigler & Ebinger, Phytologia 88(1): 77. 2006.

Sinônimo: Acacia velutina DC., Prodr. 2: 459. 1825.

Fotos: Cesar Roberto Scheffler, Marechal Cândido Rondon, Paraná, Brasil.

Referências

-Brazil Flora Group. 2015. Growing knowledge: an overview of Seed Plant diversity in Brazil. Rodriguésia 66(4): 1085–1113.

-Forzza, R. C. 2010. Lista de espécies Flora do Brasil http://floradobrasil.jbrj.gov.br/2010. Jardim Botânico do Rio de Janeiro, Rio de Janeiro.

-Morim, M.P.; Barros, M.J.F. Senegalia in Lista de Espécies da Flora do Brasil. Jardim Botânico do Rio de Janeiro. Available in: . Access on: 26 Mai. 2015

-Queiroz, R.T.; Souza, B.I. e Borges Neto, I.O. 2020. Guia de Angiospermas dos Campos dos Areais do Sudoeste do Rio Grande do Sul. Porto Alegre: Editora

-Terra, V.; Morim, M.P. 2020. Senegalia in Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro.Available at: <http://reflora.jbrj.gov.br/reflora/floradobrasil/FB101011>. Accessed on: 20 Apr. 2021

-W3trópicos https://www.tropicos.org/name/40035343 acess on: 05 Mar. 2021

Exsicatas

Reflora 

 

Leguminosae Juss. from Nascentes do Rio Parnaíba National Park, Brazilian Cerrado

Cenostigma macrophyllum

 Leguminosae Juss. from Nascentes do Rio Parnaíba National Park, BrazilianCerrado

Abstract A synopsis of the Leguminosae from the Park Nacional das Nascentes do Rio Parnaíba (PNNRP), located in the northern and northeastern regions of Brazil, is presented herein. A total of 68 species and 2 infraspecific taxa belonging to 29 genera and four subfamilies (i.e., Caesalpinioideae, Papilionoideae, Detarioideae, and Cercidoideae) were recorded. Of these, 14 species were considered new records for the northeastern or northern regions of Brazil, or for the states encompassing PNNRP. Genera with the highest number of species were Chamaecrista (15 spp.), Bauhinia (8 spp.), and Mimosa (6 spp.). Regarding plant physiognomies where the species were collected, Cerrado sensu stricto was predominant, followed by Cerradão and Veredas. Most of catalogued species had an unassessed conservation status, except for Bowdichia virgilioides, Chamaecrista coradinii, and Hymenaea parvifolia, which were classified as Near Threatened and Vulnerable, respectively. Treatment includes information on geographical distribution and taxonomic notes for species with an extended range. 

Key words: Fabaceae, diversity floristics, MATOPIBA, New records, Northeast Brazil

- BASTOS, MARIA DA CONCEIÇÃO DE C., LUCAS C. MARINHO, DANIELA CRISTINA ZAPPI, RUBENS TEIXEIRA QUEIROZ, and ROZIJANE SANTOS FERNANDES. 2025. “Leguminosae Juss. From Nascentes Do Rio Parnaíba National Park, Brazilian Cerrado”. Phytotaxa 693 (3):183-204. https://doi.org/10.11646/phytotaxa.693.3.1.

Circumscribing Chamaecrista section Baseophyllum (Caesalpinioideae, Leguminosae) based on molecular data and morphology

 Circumscribing Chamaecrista section Baseophyllum (Caesalpinioideae, Leguminosae) based on molecular data and morphology

Abstract

Advances in phylogenetic knowledge have brought about the need to combine the widely accepted principle of monophyly with morphological diagnosability in proposing new classifications. This is the case of the genus Chamaecrista (Leguminosae, Caesalpinioideae), where the traditional infrageneric classification has not been supported by the genus’s phylogenetic structure. In this study, we used a comprehensively sampled phylogeny to reassess the recently published infrageneric classification of Chamaecrista. We generated 471 sequences from three plastid and two nuclear DNA regions, including entirely new accessions from a fresh specimen of the morphologically puzzling Chamaecrista bucherae from the monospecific sect. Adenophyllum. By conducting ancestral character reconstruction analyses to trace the evolution of morphological traits, we aim to assess the congruence between traditional and alternative classifications of the sect. Baseophyllum. Our findings have unveiled three evolutionarily, geographically, and morphologically coherent lineages, which we reclassify as the three sections: Adenophyllum, Baseophyllum, and Otophyllum. This newly proposed infrageneric classification within Chamaecrista ensures nomenclatural stability and more practical identification, enhancing the challengeable taxonomy of this highly diverse genus.

Floral Nectaries in Leguminosae: Structure, Diversity, and Possible Evolution

 Floral Nectaries in Leguminosae: Structure, Diversity, and Possible Evolution

 Abstract Leguminosae, the third largest angiosperm family, is a taxon displaying the excep tional diversity of flowers and having great agricultural significance. Despite the broad range of reproductive strategies in this group, floral nectar is a key reward of legumes. The paper aims to summarize the available data on structure, ontog eny, regulation, and possible evolution of the leguminous floral nectaries. To date, detailed characterization of ultrastructure and mode of secretion is available only for a few representatives of the family whereas the majority remains understudied from this perspective. In most cases, regardless of flower symmetry, nectaries are localized between stamens and a carpel. The nectar is usually exuded from modified stomata although the exact mode of secretion by specialized parenchyma may differ between taxa. The leguminous floral nectaries often have certain features of mono symmetry with preferentially abaxial development. Nectaries were independently lost in several lineages, and equally recurrent is the emergence of substitutive, i.e. evolutionary innovative, nectar-producing structures. Floral nectaries possess a cer tain degree of evolutionary inertia, i.e. they remain stable even in lineages in which f lower morphology underwent significant changes compared with an ancestral plan, such as shifts in merism, symmetry, reduction or polymerization of organs and alike. Due to their evolutionary stability, floral nectaries are rarely used in the tax onomy of Leguminosae.

 Keywords Androecium · Fabaceae · Monosymmetry · Nectar · Pollination

-Sinjushin, A. Floral Nectaries in Leguminosae: Structure, Diversity, and Possible Evolution. Bot. Rev. (2024). https://doi.org/10.1007/s12229-024-09305-4