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Neste trabalho foram tratadas, palinologicamente, 11 espécies de Apocynaceae pertencentes a sete gêneros, ocorrentes na restinga de Carapebus, situada no litoral norte do Estado do Rio de Janeiro. As espécies tratadas foram: Aspidosperma parvifolium A. DC.; Forsteronia leptocarpa (Hook. & Arns.) A. DC.; Himatanthus lancifolius (Müll. Arg.) Woodson; Mandevilla fragrans (Stadelm.) Woodson; Mandevilla sp.; M. moricandiana (A. DC.) Woodson; M. tenuifolia (J.C. Mikan) Woodson; Prestonia coalita (Vell.) Woodson; Rhabdadenia pohlii Müll. Arg.; Tabernaemontana flavicans Willd. ex Roem. & Schult.; T. laeta Mart. Os grãos de pólen foram tratados pelo método da acetólise láctica, medidos, descritos e ilustrados sob microscopia de luz e microscopia eletrônica de varredura. Os resultados obtidos mostraram que dois grandes grupos podem ser identificados: grãos de pólen colporados - Aspidosperma parvifolium (5-6-colporados, exina psilada, rugulada apenas no apocolpo), Himatanthus lancifolius (3-colporados, exina reticulada), Tabernaemontana flavicans (4-colporados, endoabertura endocingulada) e T. laeta (3-4-colporados, exina rugulada); grãos de pólen porados - Forsteronia leptocarpa, as quatro espécies de Mandevilla, Prestonia coalita e Rhabdadenia pohlii. Concluiu-se que os gêneros puderam ser separados utilizando-se as características polínicas e, dentro do gênero, as espécies estudadas apresentaram heterogeneidade polínica. Eleven species of Apocynaceae belonging to seven genera were palynologically studied in this work. The species occur in the "restinga" of Carapebus, located on the north coast of Rio de Janeiro State. The species were as followed: Aspidosperma parvifolium A. DC.; Forsteronia leptocarpa (Hook. & Arns.) A. DC.; Himatanthus lancifolius (Müll. Arg.) Woodson; Mandevilla fragrans (Stadelm.) Woodson; Mandevilla sp.; M. moricandiana (A. DC.) Woodson; M. tenuifolia (J.C. Mikan) Woodson; Prestonia coalita (Vell.) Woodson; Rhabdadenia pohlii Müll. Arg.; Tabernaemontana flavicans Willd. ex Roem. & Schult.; T. laeta Mart. The pollen grains were treated by the lactical acetolysis method, measured, described and illustrated by light microscopy and scanning electronic microscopy. The results obtained showed that two large groups can be identified: colporate pollen grains - Aspidosperma parvifolium (5-6-colporate, psilate exine, rugulate only apocolpus), Himatanthus lancifolius (3-colporate, reticulate exine), Tabernaemontana flavicans (4-colporate, endocingulate endoaperture) and T. laeta (3-4-colporate, rugulate exine); porate pollen grains - Forsteronia leptocarpa, the four species of Mandevilla, Prestonia coalita, Rhabdadenia pohlii. It was concluded that the genera could be separated by pollinical characters and within genera their species studied are heterogeneous palynologically

Palinotaxonomia de espécies de Apocynaceae ocorrentes na Restinga de Carapebus, Carapebus, RJ, Brasil