A new species of Blechnum L. (Blechnaceae, Polypodiopsida) from central-western Brazil, with an updated key to the species in the country

ABSTRACT We describe a new species of Blechnum from Mato Grosso, Brazil: Blechnum rivulorum sp. nov. This new species was discovered as a result of visits to the herbaria BM, K, P, PR, and S, as part of the Reflora Project, by the first author. We also indicate its position in a new Blechnum phylogeny. Additionally, we confirm the occurrence of Blechnum meridense Klotzsch in Brazil and provide an updated key to all species of Blechnum in the country.

摘要：本文记述了产自巴西马托格罗索州的乌毛蕨属（Blechnum）一新种——溪生乌毛蕨（Blechnum rivulorum sp. nov.）。该新种系第一作者参与Reflora计划期间，对BM、K、P、PR及S标本馆开展访查时发现。本文同时明确了该新种在乌毛蕨属新系统发育框架中的系统位置。此外，本文确认了梅氏乌毛蕨（Blechnum meridense Klotzsch）在巴西的分布，并为巴西境内所有乌毛蕨属物种提供了更新的检索表。