Flórula fanerogâmica das restingas do Estado do Pará: leguminosae-mimosoideae

Abstract

This study deals with the taxonomic treatment of Mimosoideae in the coastal sandbanks of Pará State, since they are poorly known under that aspect. The methodology includes the analysis of botanical material originated from new collections and specimens from the herbaria MG and IAN, beyond specialized literature. In the results, identification key, descriptions, and illustrations of the taxa are given, as well as further data concerning geographical distribution, additional comments, flowering and fructification period, and habitat of the species. The fruit was the character of larger prominence in the separation of taxa. The results pointed out the presence of seven species {Calliandra surinamensis Benth. Chloroleucon acacioides (Ducke) Barneby & J. W. Grimes, Inga cayennensis Sagot ex Benth., Inga heterophylla Willd., Ingapilosula (Rich.) J.F. Macbr., Inga splendens Willd. and Mimosa candollei R. Grether), three varieties {Aharema cochleata (Willd.) Barneby & Grimes var. cochleata, Entadapolystachya (L.) DC. var. Polystachya and Mimosapudica var. unijuga (Walp. & Duchass.) Griseb.) and one subspecie {Inga thibaudiana DC. subsp. thihandiand), distributed in six genera and two tribes. Inga cayennensis, Inga thibaudiana subsp. thibaudiana e Mimosa candollei are new records for the sand coast of Pará. The genus Inga Mill. was the most representative with five species. Entada polystachya var. polystachya and specially Chloroleucon acacioides presented the widest distribution, and forest formation was the ecosystem which had the largest number of species.