Eleocharis R. Br. (Cyperaceae) in the Coastal Region of Piauí State, Brazil: A Floristic Treatment

Abstract

A taxonomic survey of the genus Eleocharis R. Br. was carried out in the four municipalities of coastal Piauí state (Cajueiro da Praia, Ilha Grande, Luís Correia and Parnaíba) included in the Parnaíba Delta Environmental Protection Area. The survey was based on the morphological study of newly collected and existing herbarium material. Six species, native but not endemic to Brazil, were recorded: Eleocharis elegans (Kunth) Roem. & Schult., E. filiculmis Kunth, E. flavescens (Poir.) Urb., E. geniculata (L.) Roem. & Schult., E. mutata (L.) Roem. & Schult. and E. subarticulata (Nees) Boeckeler. Eleocharis flavescens and E. subarticulata are new records for Piauí and E. subarticulata also for the Brazilian Northeast. Descriptions, illustrations, identification keys and information on geographic distribution and habitat are presented. The identification key is provided in English and Portuguese.

Passifloroideae from coastal Piauí, Brazil

“…This study is part of a broader project on the flora of Piauí, and accounts of some taxa have already been published for the coastal region of the state, such as Pontederiaceae (Nascimento et al, 2013), Panicoideae (Poaceae) (M.C.A. Costa et al, 2015), Lythraceae (Silva et al, 2015), Araceae (Freitas et al, 2017) and Cyperaceae (Andrade et al, 2019). These studies have contributed to knowledge of biodiversity, geographic distribution and conservation of species in the state.…”