A família Xyridaceae no município de Mucugê, BA, Brasil

Abstract

-(The family Xyridaceae in the municipality of Mucugê, Bahia State, Brazil). We aimed to elaborate the monograph of Xyridaceae from the municipality of Mucugê in Central Bahia. Mucugê is located in the northern range of Espinhaço Ridge, within Parque Nacional da Chapada Diamantina and Parque Municipal de Mucugê. The study was based on field collections and herbarium specimens and revealed the occurrence of 19 species, including five endemics for Chapada Diamantina. This paper is part of Flora da Bahia project. The vegetation occurs over quartzite rocky outcrops called campo rupestre, one of the richest centers of diversity of Brazilian flora. The peculiar conditions of soil and climate, together with the topography of the Espinhaço Range, favor the high endemism observed for several plant families, including Xyridaceae. Identification keys, species descriptions, illustrations, data on geographical distribution, and taxonomic discussions are provided.

What is being published on floristics? an overview of floristic studies carried out in the Espinhaço Range

“…Other families, including Apocynaceae, Melastomataceae, Rubiaceae, Orchidaceae, Poaceae, Eriocaulaceae, Xyridaceae, and Myrtaceae, also have a high sampling effort in the Espinhaço Range (Figure 3A). The most species-rich genera in the checklist are presented in Figure 3B and may have appeared due to four conditions: 1) Floristic studies exclusive for Paepalanthus (Hensold 1998;Andrino & Costa 2013;Andrino et al 2015), Chamaecrista (Zeferino et al 2019;Cota et al 2020), and Paspalum (Pimenta et al 2019); 2) Monogeneric families studies (Xyridaceae, Xyris) (Wanderley & Silva 2009;Wanderley 2011;Silva & Wanderley 2013); 3) Presence in the family of the richest genera know to Espinhaço Range, Microlicia (Melastomataceae) (Pataro et al 2017;Pacifico & Fidanza 2018); and 4) Several studies on specific genera, such as Mikania, which appear in of the 11 Asteraceae's Floras (Hind 2003;Moura & Roque 2014;Roque et al 2016;Contro & Nakajima 2017;Staudt et al 2017;Staudt & Roque 2020). These genera are rich in species endemic to the Espinhaço Range (Colli-Silva et al 2019a).…”

Typification of binomials in Xyris section Nematopus (Xyridaceae) published by L.A. Nilsson

“…The family Xyridaceae comprises about 400 species (Wanderley 2011, Silva and Wanderley 2013, Mota and Wanderley 2014, Santos-Guedes and Wanderley 2015), of which approximately 92% occur in Brazil (Flora do Brasil 2016). The most recent monograph of Xyridaceae in Brazil (Smith and Downs 1968) recognized 115 species of Xyris .…”