Apocynaceae Juss. s.l. das restingas do estado do Pará.

Abstract

This research consists on the taxonomic treatment of the Apocynaceae s.l. from the restingas of Pará. Results presented consist on the elaboration of descriptions, illustrations and dycotomic keys of the species occurring within the study area, aiming to make their identification easier. In addition to that, there are information about geographic distribution, taxonomic commentary, flowering and fructification period, and species habitat. Apocynaceae s.l. from the restingas of Pará are represented by twelve species distributed among three subfamilies, eleven genera and seven tribes, presented here: Allamanda cathartica L., Blepharodon pictum (Vahl) W.D. Stevens, Calotropis procera (Aiton) W.T. Aiton, Ditassa hispida (Vell.) Fontella, Funastrum clausum (Jacq.) Schltr., Himatanthus articulatus (Vahl.) Woodson, Mandevilla hirsuta (Rich.) K. Schum, Mandevilla scabra (Hoffmanns, ex Roem. & Schult.) K. Schum., Marsdenia macrophylla (Humb. & Bonpl. ex Schult) E. Fourn., Odontadenia nitida (Vahl) Müll. Arg., Rhabdadenia biflora (Jacq.) Müll. Arg., and Tabernaemontana angulata Mart. ex Müll. Arg. The most representative subfamily with five species was Asclepideae R. Br. Ex Burnett, followed by Apocynoideae Burnett with four species and Rauvolfioideae Kostel, with three species. The most representative genus was Mandevilla Lindl, with two species. Himatanthus articulatus shows the highest number of samples and Calotropis procera and Allamanda cathartica are invasive species, the former being exotic and the latter being a new register for the restingas of Pará. The highest number of species was harvested within formation campo de dunas, followed by formation aberta de moitas.