An evaluation of the endemic bryophyte flora of Guadeloupe Author Gradstein, S. Robbert Muséum National d’Histoire Naturelle - Sorbonne Universités, Institut de Systématique, Évolution, Biodiversité (UMR 7205), BP 39, 57 rue Cuvier, 75005 Paris (France) robbert. gradstein @ mnhn. fr (corresponding author) gradstein@mnhn.fr Author Bernard, Elisabeth Lavocat Moreau, 97128 Goyave, Guadeloupe, F. W. I. Corresponding member of the Muséum National d’Histoire Naturelle, Institut de Systématique, Évolution, Biodiversité, 75005 Paris (France) lisalavocat @ hotmail. com lisalavocat@hotmail.com text Cryptogamie, Bryologie 2020 2020-10-14 20 15 205 214 http://dx.doi.org/10.11646/zootaxa.4878.3.2 journal article 10.5252/cryptogamie-bryologie2020v41a15 1776-0992 7822144 Plagiochila deflexa Mont. & Gottsche Annales des Sciences Naturelles; Botanique , série 4, 6: 192 (1856). Plagiochila saxicola Steph. , Bulletin de l’Herbier Boissier , sér. 2, 5: 886 (1905), nom. illeg. (non [Schrad.] Nees); Stephani, Icones Ineditae 11361, 11362. — Type : Guadeloupe , l’Herminier s.n. (lecto-, designated here, G[G00113020!], c . gyn. & andr.; syn-, Duss 317 , G[G00113022!], Duss 453 , G[G00113021!]), syn. nov . Remarks Plagiochila deflexa is a neotropical-Hawaiian disjunctive species that is known in the Neotropics from Cuba , Central America and the northern Andes ( Heinrichs et al. 2002 ; Gradstein in press); it had not yet been recorded from the Lesser Antilles. The species is recognized by the medium-sized plants ( c . 3-5 mm wide) with exclusively intercalary branching, ovateoblong to elongate-triangular, ventrad leaves with a rather narrow apex, an ampliate ventral base, rather few ( c . 15-20) triangular teeth along the leaf margins, leaf cells c . 25-35 µm wide in midleaf and with large trigones, and leaf base with a conspicuous vitta-like area of larger cells. The species may be confused with P. adianthoides (Sw.) Lindenb. but the latter species lacks a vitta, the leaf margin in P. adianthoides is usually bordered by thicker-walled cells (forming a yellowish border), the marginal teeth are more numerous (20-50 per leaf) and more linear in shape, the trigones are smaller and the leaf apex is more broadly rounded.