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Chamaecrista sparsifolia. A. Flowering branch. B. Plant height. C. Leaves. D. Detail of inflorescence showing flowers and buds. E. Flower. F. Fruiting branch. G. Fruit. Photographs taken by Marcos J. Silva.
Source publication
Chamaecrista irwiniana, a new species of Chamaecrista sect. Absus subsect. Absus ser. Rigidulae, is here described and illustrated. Its morphological affinities, geographical distribution, ecology, conservation status, and information about leaf anatomy are also presented. Additionally, a complete description, distribution, and the first illustrati...
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Chamaecrista oligandra from the Brazilian Cerrado, the most diverse savannah and one of 34 hot spots of the world, is herein described, illustrated, and compared with C. flexuosa var. flexuosa and C. parvistipula, its morphologically similar congeners. The flowering and fruiting, environmental preferences, distribution map, images, and preliminary...
Citations
... The latest approach has been used to differentiate taxa in the genus by different authors (e.g. Coutinho et al. 2012;Coutinho et al. 2013;Souza et al. 2015;Silva et al. 2017), which have notified that the taxa studied by them differed by a set of characters such as the arrangement, type and numbers of vascular bundles in the petiole/rachis and midrib, type of mesophyll, presence and type of idioblasts in the adaxial and abaxial epidermis, presence, type, shape and location of nectaries, outline of the petiole/rachis and leaf margin, presence and type of trichomes, outline of the anticlinal walls of the epidermal cells, and the position and type of stomata, among others. ...
... Others characteristics, such as the presence of fibers surrounding the tracheal elements, provide mechanical support to the cells, avoiding cell collapse due to water stress (Holtzmeier et al. 1998), in the same way as trichomes, which minimize water loss and act in defense against herbivory (Silva et al. 2017). According to Bieras & Sajo (2009), Souza et al. (2015 and Silva et al. (2017), these characters are common in plants of the Cerrado, including species of Chamaecrista (Silva et al. 2017). ...
Analysis of Brazilian collections and foreign herbaria, specially of those from the Midwest region of Brazil for taxonomic studies on Chamaecrista sect. Absus subsect. Absus developed by the authors, resulted in a discover a new species. Chamaecrista barnebyana is here described, illustrated, and commented on its distribution, conservation assessment, including environmental preferences, flowering and fruiting, and position systematic. Additionally, it is compared with morphologically similar species using macro-morphological and foliar anatomy characteristics.
... Brazil is an important diversity center of Chamaecrista, with 259 species, of which 216 are endemic, mainly to the Cerrado Phytogeographical Domain (Brazilian Savannas), where 223 species have been already reported (BFG 2015, Irwin & Barneby 1982. However, in view of its morphological diversity and large capacity to colonize environments (Irwin & Barneby 1982), a lot has yet to be discovered about this genus, especially in Central Brazil, where some new species have been revealed recently (Silva & Souza 2014, Souza & Silva 2015aand 2015b, Mendes et al. 2017, Souza & Silva 2018, as in the state of Tocantins, in the northern region, where the richness of this genus was recently increased with ten new records of the described species (Mendes et al. 2017). ...
Taxonomic studies in the genus Chamaecrista based on botanical collections from its endemic area, detailed analysis of our own collections and of herbaria, and in specialized literature enabled the discovery of a new species in the State of Tocantins, Brazil. The new species Chamaecrista pauciflora is herein described, illustrated, assigned to Chamaecrista sect. Absus subsect. Absus ser. Rigidulae and compared with C. azulana and C. filicifolia. The geographical distribution, conservation status, period of flowering and fruiting, morphological relationships, and environmental preferences of the new species are also provided. Additionally, a key to the species of Chamaecrista ser. Rigidulae occurring in Tocantins is presented.
... The floristic survey of the Chapada dos Veadeiros National Park, conducted since 2011, has revealed some new species of the genera Aeschynomene L. (Leguminosae) (Silva & Antunes, 2014), Chamaecrista Moench (Leguminosae) (Silva & Souza, 2014Souza & Silva, 2015a, 2015bSouza et al., 2015), Croton L. (Euphorbiaceae) , and Manihot Mill. (Euphorbiaceae) (Silva, 2014(Silva, , 2015a(Silva, , 2015b(Silva, , 2016Silva & Sodré, 2014;Silva et al., 2013Silva et al., , 2016aSilva et al., , 2016b. ...
... The floristic survey of the Chapada dos Veadeiros National Park, conducted since 2011, has revealed some new species of the genera Aeschynomene L. (Leguminosae) (Silva & Antunes, 2014), Chamaecrista Moench (Leguminosae) (Silva & Souza, 2014Souza & Silva, 2015a, 2015bSouza et al., 2015), Croton L. (Euphorbiaceae) , and Manihot Mill. (Euphorbiaceae) (Silva, 2014(Silva, , 2015a(Silva, , 2015b(Silva, , 2016Silva & Sodré, 2014;Silva et al., 2013Silva et al., , 2016aSilva et al., , 2016b. ...
Microlicia veadeirana, a new species found in the Chapada dos Veadeiros National Park, Goiás, is herein described and illustrated. Additionally, its conservation status, environmental preferences, and period of flowering and fruiting are provided. The novel species is morphologically similar to M. isostemon, M. consimilis, and M. cryptandra based on a set of characters such as general appearance of the stem, length of leaves, color of petals, stem orientation, and number of locules in the ovary. However, it is distinguished from these species by a series of characters, including 1-nerved leaves, with the margin not ciliate, a crown of trichomes at the apex of the hypanthium, the length of the connectives of the stamens, and urceolate capsules.
... Multiple new species have been described recently from this area (Pastore & Marques 2009;Souza & Bove 2011;Silva et al. 2013;, including some species from the legume genera Aeschynomene L. (Linnaeus 1753: 713) (e.g., Silva & Antunes 2014), and Chamaecrista Moench (1794: 272) (e.g. Silva & Souza 2014, Souza & Silva 2015a. ...
During a taxonomic study of Eriosema in Brazil, a new species was discovered from the Chapada dos Veadeiros National Park, Goiás State. Eriosema elegans is herein described and illustrated and its morphological affinities with related species discussed. The geographical distribution, conservation status, and information about flowering and fruiting are provided. Also, a study of secretory structures of leaflets of the new species and the morphologically related species E. glabrum was carried out.
As a result of a taxonomic and phylogenetic study of Chamaecrista sect. Absus, we identified two new species of Chamaecrista from Brazil and Bolivia, which we designate here as C. oppositifolia and C. longistyla. Morphologically, C. oppositifolia resembles C. sincorana, while C. longistyla is similar to C. paraunana and C. brevicalyx. Description, illustration, diagnostic morphology, systematic position, phenology, distribution, images and preliminary conservation status are provided for both new species. Phylogenetic inference and morphology show that the two new species are clearly distinct and belong to C. sect. Absus, ser. Rigidulae (C. oppositifolia) and ser. Absoideae (C. longistyla).
During the course of a taxonomic study of Chamaecrista sect. Absus subsect. Absus ser. Rigidulae, a new species of Chamaecrista was discovered growing in disturbed areas of Cerrado sensu stricto in the municipality of Alto Paraíso de Goiás. Chamaecrista elata is herein described and illustrated. Morphological comparison with related species and information on geographical distribution, environmental preferences, conservation status, and phenology are provided.
Chamaecrista tocantinensis, a new species of Chamaecrista sect. Absus subsect. Absus ser. Paniculatae endemic to the Jalapão region in the state of Tocantins, Northern Brazil, is herein described and illustrated. The systematic position, conservation status, flowering and fruiting period, geographical distribution, and morphological relationships of this novel species with C. claussenii var. megacycla, C. lundii, and C. orbiculata var. orbiculata are discussed. A key to all taxa of Chamaecrista hitherto known from the state of Tocantins, including ten new state records, is also provided.
Chamaecrista has a Pantropical distribution, with some occurrences in Australia and temperate areas, and includes about 330 species, of which 266 occur in the Americas. The genus is represented in Brazil by 256 species, of which 97 are cited for the northeast Region. The Ecological Station Raso da Catarina (ESRC) is one of the largest areas of protected Caatinga and occupies about 105,282.00 ha., delimited by the coordinates 09°39’0.30” to 09°50’98.2” S and 38°26’57.5” to 38°29’32.6” W. The floristic survey of Chamaecrista in the ESRC included analysis of specimens collected from March 2010 and October 2011. The analyses were supplemented with dried collections from the following herbaria: ALCB, EAC, HRB, HUEFS and MBM. The genus is represented in the study area by ten taxa. The most representative taxa in the area were Chamaecrista repens (Vogel) H.S.Irwin & Barneby var. multijuga (Benth.) H.S.Irwin & Barneby, C. brevicalyx (Benth.) H.S.Irwin & Barneby var. brevicalyx, C. belemii (H.S.Irwin & Barneby) H.S.Irwin & Barneby var. belemii, wich are directly related to sandy soils common in the region. The taxonomic treatment includes a key for the identification, descriptions, illustrations, photos, data geographical distribution, reproductive phenology and comments about the taxa.
