67 urn:lsid:arphahub.com:pub:0EB7B745-BA33-591F-8755-8E4C5B0D1E08 Check List CheckList 1809-127X Pensoft Publishers 10.15560/18.3.507 78773 Notes on Geographic Distribution Plantae Polygonaceae Americas Mexico Yucatan Persicaria barbata (L.) H. Hara and Persicaria glabra (Willd.) M. Gómez (Polygonaceae): two newly recorded species from the Yucatan Peninsula and Mexico Ortiz-Díaz Juan Javier 1 Conceptualization Writing - review and editing Ancona Juan José juanjo.ancona@gmail.com 1 Conceptualization Data curation Writing - original draft Writing - review and editing Tun-Garrido Juan 1 Data curation Writing - review and editing Universidad Autónoma de Yucatán, Mérida, Mexico Universidad Autónoma de Yucatán Mérida Mexico

Corresponding author: Juan José Ancona (juanjo.ancona@gmail.com).

Academic editor: Marcelo Trovó Lopes de Oliveira

 2022 13 05 2022 18 3 507 513 676C8283-A3FA-5FE3-8260-A770E17C0F10 02 12 2021 27 04 2022 Juan Javier Ortiz-Díaz, Juan José Ancona, Juan Tun-Garrido This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Two species of Persicaria (L.) Mill. are reported for the first time in the Neotropics. Persicaria glabra (Willd.) M. Gómez is reported for the first time as part of the flora of the Yucatan Peninsula, Mexico, and Persicaria barbata (L.) H. Hara is newly recorded from Mexico and the Americas. We present morphological descriptions of these two species along with figures, a distribution map, and a dichotomous key for the identification of the six species of Persicaria from the Yucatan Peninsula.