Novas espécies de catasetum l. c. ex kunth. e coryanthes hook. (orchidaceae) para a Amazônia brasileira.

Abstract

The Orchidaceae family presents a great diversity of species and a wide geographical distribution in the Amazonian flora. We can see that many groups are little studied and present great taxonomic problems. The purpose of this project is to analyze the collected botanical material, studying, at the taxonomic level, the genera Catasetum and Coryanthes. The six species presented here are new to science, since they do not fit into any of the existing ones, according to detailed bibliographic reviews of the species, including reviews of the referred genera. The material used in the research were live specimens preserved in alcohol, collected in the states of Amazonas and Pará. The new taxa are: Catasetum tucuruiense da Silva & Oliveira, Catasetum x batista and Silva & Oliveira, Catasetum x mojuense da Silva & Oliveira, the last two being natural hybrids; Coryanthes: Coryanthes cavalcantei Silva & Oliveira, Coryanthes elianae Silva & Oliveira and Coryanthes miuaense da Silva & Oliveira. The species are quite distinct from each other, as can be seen in a dichotomous key presented in the final report.