Abstract
Lagenocarpus (Cyperaceae) is a Neotropical genus and currently comprises 15 species. The genus has two centers of diversity: the rocky grasslands of the Brazilian Shield and the white-sand savannas of the Guiana Shield. In the Guiana Shield, its diversity is probably underestimated and the identifications of known species are frequently mistaken. Here, we describe a new Lagenocarpus species from the Guiana Shield distinguished from L. glomerulatus and L. pendulus mainly by its inflorescence, spikelets and fruit characters.
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