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Spermacoceae (Rubiaceae) no Rio Grande do Norte, Brasil

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Previous issue date: 2016-08-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Rubiaceae ? a quarta fam?lia mais representativa em n?mero de esp?cies dentre as Angiospermas, com 13.526 esp?cies em 620 g?neros. No Brasil, a fam?lia ? representada por 1.375 esp?cies, sendo 389 ocorrentes no Nordeste. A tribo Spermacoceae apresenta distribui??o pantropical e ? caracterizada por plantas predominantemente herb?ceas com est?pulas fimbriadas e flores geralmente tetr?meras, representadas no Brasil por 217 esp?cies em 17 g?neros. O presente estudo teve como objetivo o estudo taxon?mico das Spermacoceae no Rio Grande do Norte (RN), a fim de contribuir para o conhecimento sobre a flora do estado, bem como auxiliar na identifica??o correta das esp?cies do grupo, as quais s?o facilmente confundidas morfologicamente, mesmo ao n?vel de g?nero. Para este estudo, foram realizadas expedi??es cient?ficas a campo, para coleta e observa??o das Spermacoceae, em ?reas de Mata Atl?ntica e Caatinga do estado, seguidas de identifica??o e descri??o das esp?cies coletadas e depositadas em herb?rios. Foram encontradas 24 esp?cies e oito g?neros. Os g?neros mais representativos foram Borreria (8 spp.), Mitracarpus (6 spp.) e Hexasepalum (4 spp.); os demais: Oldenlandia (2 spp.) e Leptoscela, Richardia, Spermacoce e Staelia com apenas uma esp?cie cada. Seis esp?cies s?o registradas pela primeira vez para a flora do Rio Grande do Norte: Borreria ocymifolia, Mitracarpus baturitensis, M. hirtus, M. longicalyx, Oldenlandia corymbosa e Staelia virgata. S?o apresentadas descri??es, ilustra??es, chave de identifica??o e dados acerca do h?bitat, fenologia e distribui??o geogr?fica das esp?cies. / Rubiaceae is the fourth largest family of Angiosperms, with 13.526 species and 620 genera. In Brazil, the family is represented by 1.375 species, of which 389 occurs in the Northeast region. The Spermacoceae is a tribe with pantropical distribution pattern, characterized by predominantly herbaceous plants with fimbriate stipules and flowers usually tetramerous, represented in Brazil by 217 species and 17 genera. This study aimed the taxonomic survey of the Spermacoceae in Rio Grande do Norte (RN), in order to contribute to the knowledge of the flora, as well as offer support to the correct identification of this group's species, which are easily confused due to the morphological resemblance, even at the generic level. For this study, field expeditions were made to collect and observe the Spermacoceae in areas of the Atlantic Forest and Caatinga in the state, followed by the identification, description of the specimens and further incorporation in herbaria. Were registred 24 species and eight genera. The most species-rich genera were Borreria (8 spp.), Mitracarpus (6 spp.) and Hexasepalum (4 spp.); Oldenlandia (2 spp.) each and Leptoscela, Richardia, Spermacoce e Staelia had only one species each. Six species are new records for the flora of Rio Grande do Norte: Borreria ocymifolia, Mitracarpus baturitensis, M. hirtus, M. longicalyx, Oldenlandia corymbosa e Staelia virgata. Descriptions, illustrations, identification key, habitat data, fenology and distribution of the species are presented.

Identiferoai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23610
Date31 August 2016
CreatorsBoeira, Tianisa Prates
Contributors48356387515, http://lattes.cnpq.br/9068052682710941, Gonzaga, Augusto Francener Nogueira, 01965437117, http://lattes.cnpq.br/1239094028330291, Sousa, Leandro de Oliveira Furtado de, 07787461780, http://lattes.cnpq.br/8157923398404157, Souza, Elnatan Bezerra de, Jardim, Jomar Gomes
PublisherPROGRAMA DE P?S-GRADUA??O EM SISTEM?TICA E EVOLU??O, UFRN, Brasil
Source SetsIBICT Brazilian ETDs
LanguagePortuguese
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis
Sourcereponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN
Rightsinfo:eu-repo/semantics/openAccess

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