ResumoO estudo foi realizado no Parque Nacional do Catimbau, Pernambuco, Brasil. Foram encontradas 101 espécies de plantas trepadeiras, distribuídas em 54 gêneros e 18 famílias. As famílias com maior diversidade foram Convolvulaceae (23) Apocynaceae (13), Fabaceae (12) e Malpighiaceae (11). As trepadeiras lenhosas e as trepadeiras herbáceas tiveram um valor equivalente a 51% e 49%, respectivamente. O mecanismo de ascensão mais frequente foi o volúvel, ocorrendo em 68% das espécies. São apresentadas novas ocorrências na Caatinga e para o estado de Pernambuco, uma chave de identificação, comentários das espécies e ilustrações de alguns caracteres diagnósticos. Palavras-chave: Caatinga, florística, flora, lianas, taxonomia. AbstractThis study was undertaken in "Parque Nacional do Catimbau", located in Pernambuco, Brazilian northeastern semiarid, where 101 species of climbing plants were recorded. The species belong to 54 genera and 18 families. The most diverse families were Convolvulaceae (23), Apocynaceae (13), Fabaceae (12) and Malpighiaceae (11). The wood and herbaceous climbing plants have an equivalent values, 51% and 49% respectively. As regards the attachment mechanisms, twining was the most frequent, occurring in 70% of the species. New occurrences of species in Pernambuco and in the Caatinga were recorded. Identification key, descriptions and comments on the species and illustrations of some diagnostic characters are presented. Key words: Caatinga, floristic, flora, lianas, taxonomy. Diversidade de plantas trepadeiras do Parque Nacional do Catimbau, Pernambuco, BrasilDiversity of climbing plants in Parque Nacional do Catimbau, Pernambuco, Brazil
A new population of Ipomoea macedoi, a critically endangered species from Brazil, was found in Chapada do Apodi (Rio Grande do Norte State). The species is recognized by its large, distinctly cordate outer sepals. A detailed description, comments on its distribution and conservation, a taxonomic comparison, photographs and a line drawing are provided.
Ipomoea L. is the largest genus in Convolvulaceae with approximately 150 species reported from Brazil, more than 50% of which are from the northeastern region of the country. The genus is represented by 48 species in Pernambuco state, occurring in Atlantic Forest and Caatinga vegetation as well as areas impacted by human activities. We present here an identification key, photographic documentation, taxonomic comments, and the geographical distributions of species in Pernambuco. New records of Ipomoea cearensis O’Donell, I. hirsutissima Gardner and I. squamosa Choisy for the state are reported.
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