RESUMO

Background: The "Serra da Concórdia" is part of the Atlantic Forest phytogeographical domain in the Brazilian state of Rio de Janeiro and it has a predominant phytophysiognomy of Semideciduous Seasonal Forest. This region underwent intense habitat loss and fragmentation during the 19th century, due to coffee plantations and later pastures. With the decline of these activities, the areas were abandoned, triggering secondary succession. In 2002, the "Parque Estadual da Serra da Concórdia" was established in this region to preserve the remaining forest fragments. The updated list of vascular plants recorded in this protected area, published in the "Catálogo de Plantas das Unidades de Conservação do Brasil", is presented here, along with information on richness, endemism, and conservation status. New information: The "Parque Estadual da Serra da Concórdia" houses 231 vascular plant species, of which 90% are angiosperms, 10% ferns and lycophytes, and 27% endemic to the Atlantic Forest. Ten species are threatened with extinction, three are categorized as Endangered, and seven as Vulnerable. Although there have been expeditions in the "Parque Estadual da Serra da Concórdia", they have been limited, resulting in a low number of records and the species richness for a protected area. This is notable considering the 2,130 Brazilian native vascular plant species recorded in the semideciduous seasonal forest of Rio de Janeiro. Our data indicates that floristic inventories of Brazilian protected areas could help highlight gaps in flora knowledge and support the proposal of effective conservation actions.

RESUMO

The diversity and richness of the Brazilian flora are documented in herbarium collections. When areas are deforested, but not documented, we lose both flora and the opportunity to know which species occupied those areas. The south-eastern mesoregion of Mato Grosso State, comprising 22 municipalities, has undergone the loss of native vegetation cover, accelerated by the substantial expansion of agribusiness. For an in-depth look at the consequences and the current state of the flora in that mesoregion, we consulted both speciesLink and JABOT databases. More specifically, we carried out a comprehensive study of herbarium collections by municipality and compiled data including scientific name, collection date, collection locality, collector name and observations made during collection. We obtained 5,861 records of angiosperms, ferns and lycophytes of 160 families, 770 genera and 1,792 species. The specimens are deposited in 80 herbaria of which the Herbarium of Universidade Federal de Mato Grosso (UFMT) hosts the largest collection. Rondonópolis was the most sampled municipality, whereas 50% of the municipalities were poorly sampled and one showed no collection records at all. Amongst the species occurring only in Mato Grosso, eleven were collected only in that mesoregion and twenty species were under some degree of threat. Our study recommends increasing collection and identification efforts to enable effective conservation actions and improve richness estimates for the State of Mato Grosso and the Cerrado, in general, before more of the flora is lost to deforestation.

RESUMO

Abstract: This work presents a floristic survey of the subfamilies Bombacoideae, Byttnerioideae, Grewioideae and Helicterioideae (Malvaceae s.l.) in the Raso da Catarina Ecoregion (RCE), Bahia, Brazil. The samples analyzed were collected from September 2013 to May 2015. The analyses were supplemented with dried collections kept in the herbaria: ALCB, HRB, HUEFS, HUNEB, HST, IPA, PEUFR, R and RB. The identifications were based mainly on specialized bibliographies, protologues, types and herbaria collections. Ten genera and 22 species of the subfamilies were recorded, nine endemic to Brazil. Waltheria L. was the most representative genus with five species, followed by Ceiba Mill. and Melochia L. with three species each, Helicteres L., Luehea Willd., Pachira Aubl. and Pseudobombax Dugand presented two species each and other genera were represented by one species each. Among the species recorded, Luehea candicans Mart. represents a new record for the Caatinga biome. The species most commonly found in the study area were Helicteres velutina K.Schum., Melochia tomentosa L., Waltheria brachypetala Turcz., W. indica L. and W. rotundifolia Schrank. The taxonomic treatment includes identification key, descriptions, illustrations, photos, geographical distribution, reproductive phenology and comments about all studied species. Keywords: biodiversity, Caatinga, morphology, semiarid, taxonomy.

Resumo: Este trabalho apresenta o levantamento florístico das subfamílias Bombacoideae, Byttnerioideae, Grewioideae e Helicterioideae (Malvaceae s.l.) na Ecorregião Raso da Catarina, Bahia, Brasil. Os espécimes analisados foram coletados no período de setembro/2013 a maio/2015. As análises foram complementadas com coleções herborizadas depositadas nos herbários: ALCB, HRB, HUEFS, HUNEB, HST, IPA, PEUFR, R e RB. As identificações foram realizadas com base, principalmente, em bibliografias especializadas, protólogos, imagens de coleções-tipo e consultas às coleções dos herbários visitados. Foram registrados 10 gêneros e 22 espécies para as subfamílias, sendo nove endêmicas do Brasil. Waltheria L. foi o gênero mais representativo com cinco espécies, seguido por Ceiba Mill. e Melochia L. com três espécies cada, Helicteres L., Luehea Willd., Pachira Aubl. e Pseudobombax Dugand apresentaram duas espécies cada e os demais gêneros foram representados cada um por uma única espécie. Entre as espécies catalogadas, Luehea candicans Mart. é um novo registro para o bioma Caatinga As espécies mais frequentes na área de estudo foram Helicteres velutina K.Schum., Melochia tomentosa L., Waltheria brachypetala Turcz., W. indica L. e W. rotundifolia Schrank. O tratamento taxonômico inclui uma chave para a identificação, descrições, ilustrações, fotografias, dados de distribuição geográfica, fenologia reprodutiva e comentários sobre todas as espécies estudadas.