Heisteria Jacq. (OLACACEAE) na Amazônia Brasileira.

Abstract

The genus Heisteria Jacq. is the most representative in number of species in Olacaceae, with 35, being mentionated 21 for Brazil, distributed in almost all the states. From these, 16 occur in Brazilian Amazon. The present work expanded the knowledge about the distribution of these taxa for the study area, as well as filled the gaps from the last revision of the genus in 1984, regarding to comments about affinities, illustrations and more detailed descriptions. The present taxonomic treatment was based on material from collections of the Amazon herbariums (EAFM, HAMAB, HERBAM, HBRA, HF, IAN, INPA, MFS, MG and RON), extra-Amazonian (BHCB, CEN, CVRD, R, RB and SP), and international (B, BM, F, G, K, L, LE, MO, NY, P and US), on specialized bibliography and data and images available on the websites SpeciesLink, JSTOR and Virtual Herbarium Reflora, besides samples obtained through field expeditions. The research resulted in one chapter, entitled “Heisteria Jacq. (Olacaceae) in the Brazilian Amazon”, on what 16 species are taxonomically treated, with conservation status, descriptions, identification key, geographical distribution, comments and botanical illustrations. Besides that, new occurrences for 10 species are reported – H. acuminata, for Amapá; H. cauliflora, for Amapá; H. duckei, for Pará; H. huberiana, for Amazonas, Rondônia and Tocantins; H. laxiflora, for Mato Grosso; H. maguirei, for Amapá; H. maytenoides, for Amazonas; H. nitida, for Pará; H. ovata, for Roraima; and H. spruceana, for Amapá, Pará and Tocantins –, it´s proposed one synonymization and lectotypification for six names (4 inadverted lectotypifications attributed to Sleumer and 2 second-step lectotypifications). Thus, the present research contributed to the knowledge of the Brazilian flora.