Novelties in Dyckia (Pitcairnioideae ‐ Bromeliaceae) from the South America dry diagonal: Two new species, a new combination and a new name

Abstract

Dyckia is a South American genus mostly distributed in the Brazilian Cerrado and Caatinga domains, which are part of the South American dry diagonal where it represents an important floristic and ecological component. Following phylogenetic studies, the genus was recently expanded to include species previously placed in Encholirium and Deuterocohnia. With this new delimitation, Dyckia comprises ca. 220 species, of which some are micro‐endemic. We present novelties in the genus for the South American dry diagonal based on fieldwork, herbarium specimens and the literature. Two new micro‐endemic species are described: Dyckia avacanoeira, endemic to Chapada dos Veadeiros; and Dyckia oreadica, endemic to the Jalapão region. We provide complete descriptions, illustrations, distribution maps, photographs, preliminary conservation assessments and comments on the taxonomy and ecology of the two species. Additionally, in view of the new circumscription of Dyckia, we provide a new name, Dyckia viridiflora, to replace an illegitimate name, and a new combination, Dyckia josinoi‐narcisae, for a species previously placed in Encholirium.

Still on the Stachytarpheta longispicata complex (Verbenaceae): two new narrowly endemic species from the Cerrado domain of Central Brazil

“…Furthermore, it is important to highlight that the great sampling effort by Antar and Sano (2019) to document the flora of the Jalapão region in State of Tocantins has revealed several new and rare species (such as Bonamia campestris Moreira and Simao‐Bianch, Chamaecrista tocantinensis Mendes and Silva, Couepia brevistaminea Barbosa‐Silva and Antar, Dioscorea compacta Araújo, Dyckia oreadica Forzza and Antar, Euphorbia adenoplicata Silva and Cordeiro, Polygala bringelii Pastore and Antar, P. tocantinensis Pastore and Antar, Homalolepis tocantina (Devecchi and Pirani) Devecchi and Pirani, Turnera fasciculifolia Rocha and Arbo). Most of them were described based on only a single or few gatherings (Devecchi and Pirani 2015, Araújo et al 2016, Mendes et al 2017, Moreira et al 2017, Barbosa‐Silva and Antar 2020, Marques‐Silva et al 2020, Rocha et al 2020, Antar et al 2021., Pastore and Antar 2021), as is the case of the S. longibracteata . Therefore, the finding of S. longibracteata alongside these several new species in the Jalapão region may stimulate conservation and botanical sampling efforts in this floristically rich region of the Cerrado domain (Antar and Sano 2019).…”