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Lejeunea bermudiana (A.Evans) R.M.Schust. The Hepaticae and Anthocerotae of North America 4: 1105 (1980). Taxilejeunea irregularis Steph. Species Hepaticarum 5: 490, 1914; Stephani, Icones Ineditae 10103. — Type: Guadeloupe, Duss 514 (holo-, G[G00069917!], autoic.), syn. nov. Remarks Lejeunea bermudiana is a common Caribbean species that is characterized by sharply apiculate leaves without or with 1-2 additional teeth on the ventral margin near apex, inflated lobules c. ¼× leaf length, thin-walled leaf cells, and bifid underleaves c. 3× stem width and with a cordate-subauriculate base, autoicous sexuality and toothed female bracts and perianths (Schuster 1980, as Crossotolejeunea bermudiana A.Evans; Reiner-Drehwald & Goda 2000)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 213, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144

Frullania kunzei (Lehm. & Lindenb.) Mont. Histoire physique, politique et naturelle de l'Île de Cuba, Botanique, Plantes cellulaires 537 (1842). (fide Stotler 1969, as F. neesii; Gradstein & Costa 2003) Frullania minima Steph. Species Hepaticarum 4: 532 (1911). Frullania urbanii Steph., Species Hepaticarum 4: 527 (1911). Remarks A widespread neotropical species., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 212, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["GRADSTEIN S. R. & COSTA D. P. 2003. - The Hepaticae and Anthocerotae of Brazil. Memoirs of the New York Botanical Garden 87: 1 - 318."]}

Plagiochila bifaria (Sw.) Lindenb Species Hepathicarum fasc. 5: 127 (1843). Plagiochila desciscens Steph., Bulletin de l’Herbier Boissier, sér. 2, 2: 867 (1902); Stephani, Icones Ineditae 11701. — Basionym: Plagiochila guadalupensis Gottsche ex Steph. “var.”, non typus (synonym of P. stricta Lindenb.). — Type: Guadeloupe, l’Herminier s.n. (lecto-, designated here, G[G00128749!]; isolecto-, G[G00065517, G00048148]!), syn. nov. Remarks Plagiochila bifaria is common and variable species that is distributed throughout the Neotropics and, in addition, occurs in coastal areas of western Europe (e.g., Heinrichs et al. 2004). Plagiochila desciscens is a phenotype with distant, ovate-oblong leaves., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 212, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["HEINRICHS J., GROTH H., LINDNER M., FELDBERG K. & RYCROFT D. S. 2004. - Molecular, morphological, and phytochemical evidence for a broad species concept of Plagiochila bifaria (Hepaticae). The Bryologist 107: 28 - 40. https: // doi. org / 10.1639 / 0007 - 2745 (2004) 107 [28: MMAPEF] 2.0. CO; 2"]}

Rectolejeunea flagelliformis A.Evans Bulletin of the Torrey Botanical Club 33: 9 (1906). (fide Reiner- Drehwald & Grolle 2012). Rectolejeunea dussii Steph. (Cheilolejeunea dussii Steph., nom. inval.) Remarks A species with scattered distribution in the Neotropics (Reiner- Drehwald & Grolle 2012)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 213, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144

Plagiochila punctata (Taylor) Taylor London Journal of Botany 5: 261 (1846). Plagiochila germani Steph., Bulletin de l’Herbier Boissier, sér. 2, 5: 938 (1905); Stephani, Icones Ineditae 11480. — Type: Guadeloupe, Germain s.n., ex hb. l’Herminier (holo-, G[G00067838!], c. gyn. & andr.), syn. nov. Remarks Plagiochila punctata is a widespread species of tropical America, East Africa and western Europe (Heinrichs et al. 2005) that had not yet been recorded from Guadeloupe. The type material of P. germani, containing P. punctata in a mixture with P. gymnocalycina (Lehm. & Lindenb.) Mont., fits Stephani’s illustration (Icones Ined. 11701) very well but the type label is confusing, stating “ Plag. herminieri St. sub Pl. germani G[ottsche] ms, Guadeloupe, l’Herminier”. The material is not copious but contains well-developed male and female plants of P. punctata, with the characteristic denuded branches due to leaves dropping off. The leaves are transverse, small, ovate, with a conspicuous vitta-like area at the base and 3-4 teeth on the margins (2 near the apex and 1-2 on the ventral margin), and the leaf cells have large trigones. The species is close to P. bifaria but the latter is a more robust plant with more numerous teeth on leaf margins and without caducous leaves., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 212, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["HEINRICHS J., LINDNER M., GROTH H. & RENKER C. 2005. - Distribution and synonymy of Plagiochila punctata (Taylor) Taylor, with hypotheses on the evolutionary history of Plagiochila sect. Arrectae (Plagiochilaceae, Hepaticae). Plant Systematics and Evolution 250: 105 - 117. https: // doi. org / 10.1007 / s 00606 - 004 - 0220 - 5"]}

Drepanolejeunea valiae Jovet-Ast Revue Bryologique et Lichénologique 18: 38 (1949). — Type: Guadeloupe, Ananas, «avec Bazzania sur branchette», Allorge s.n. (holo-, PC[PC0102340!]). 16° 16° FIG. 4.— Distribution of Frullania trigona L.Clark,Jovet-Ast & Frye (★) and Riccardia innovans (Steph.) Pagán (●) in Guadeloupe. Remarks Drepanolejeunea valiae has been reported from Dominica (Schuster 1992, 1996) and Jamaica (Schäfer-Verwimp & van Melick 2016), hence is not endemic to Guadeloupe.According toBischler (1964) and Schuster (1996) it is a good species. The holotype material was erroneously cited as “isotype” by Bischler (1964)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on pages 209-210, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["BISCHLER H. 1964. - Le genre Drepanolejeunea Steph. en Amerique Centrale et Meridionale. Revue Bryologique et Lichenologique 33: 15 - 179."]}

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., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on pages 212-213, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["HEINRICHS J., GROTH H., HOLZ I., RYCROFT D. S., RENKER C. & PROSCHOLD T. 2002. - The systematic position of Plagiochila moritziana, P. trichostoma and P. deflexa, based on ITS sequences of nuclear ribosomal DNA, morphology and lipophylic secondary metabolites. The Bryologist 105: 189 - 203. https: // doi. org / 10.1639 / 0007 - 2745 (2002) 105 [0189: TSPOPM] 2.0. CO; 2"]}

Harpalejeunea stricta Lindenb. & Gottsche) Steph. Species Hepaticarum 5: 259 (1913).— Type: Mexico, Veracruz, Mirador, Liebmann s.n., c. gyn. (isosyn-, G[G00115038, G0011539]!). Harpalejeunea herzogii Jovet-Ast, Feddes Repertorium Species Novae Regni Veg. 58: 19 (1955). — Type: Guadeloupe, “Carbet, sur rocher humide,” 15.II.1936, P. & V. Allorge s.n., c. gyn. (holo-, PC[PC0103158!]), syn. nov. Remarks Harpalejeunea stricta is a widespread neotropical species. Harpalejeunea herzogii is a phenotype with ciliate perianths; typical H. stricta has shortly toothed keels. In other respects, the two species are identical. Perhaps H. herzogii may be retained as a variety of H. stricta. In Brazil plants with ciliate perianths has been described as H. schiffneri S.W.Arnell (see Gradstein & Costa 2003), which may be a further synonym of H. stricta., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 212, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["GRADSTEIN S. R. & COSTA D. P. 2003. - The Hepaticae and Anthocerotae of Brazil. Memoirs of the New York Botanical Garden 87: 1 - 318."]}

Gradstein, S. Robbert, Bernard, Elisabeth Lavocat (2020): An evaluation of the endemic bryophyte flora of Guadeloupe. Cryptogamie, Bryologie 20 (15): 205-214, DOI: 10.5252/cryptogamie-bryologie2020v41a15, URL: http://dx.doi.org/10.11646/zootaxa.4878.3.2

Frullania trigona L.Clark, Jovet-Ast & Frye (Figs 1, 4) The Bryologist 50: 52 (1947). — Type: Guadeloupe, Traces Hugues, “sur branchettes”, P. & V. Allorge s.n. (iso-, PC[PC0102212, PC0102211 (slide)]!). Remarks Frullania trigona is a member of subg. Frullania sect. Microphyllae (R.M.Schust.) Gradst., Lima & Ilk. -Borg., a small group of about ten species including three in the Neotropics (Lima et al. 2020). Characteristic of this section are the small, dioicous plants, less than 1 mm wide, with caducous leaf lobes, ocelli in leaf lobes (and sometimes in underleaves), and small, distant underleaves.Within this group, F.trigona stands out by scattered ocelli in leaves but not in underleaves, margins of leaves and underleaves distantly crenulate by projecting trigones,underleaves scarcely wider than the stem, and female bracts and bracteoles with entire margins. The species is only known from the type., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 206, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144

Riccardia innovans (Steph.) Pagán (Figs 2 -4) The Bryologist 45: 80 (1942). — Basionym: Aneura innovans Steph., in Urban, Symbolae Antillarum 2: 470 (1901). — Type: Guadeloupe, Savane-à-Mulets, «Sur les arbrisseaux », 1901, Duss 484, ex hb. Urban (lecto-, designated here, G[G00066662!], c. gyn.; isolecto-, NY n.v., fide Pagán 1942). Description The outstanding characters of R. innovans are the very delicate, 2-pinnate plants with a very narrow (150-250 µm in diameter), biconvex, almost wingless axis and numerous long and narrow, linear to subulate branches. The branches are only little narrower than the axis, plano-convex, obliquely to widely spreading, usually tapering to narrow tips, and narrowly winged by 1-2 cell wide wings. The presence of small scales on the calyptra, made up of large cells, may be a further characteristic of the species. The plants are dioicous; gemmae have not been observed. Remarks Riccardia innovans approaches R. regnellii (Ångstr.) K.G.Hell, but the latter is a larger plant with a flat axis (not biconvex) and with broader, frequently tongue-shaped branches. In the type material, some R. regnellii plants are growing mixed in the dense mat of R. innovans and are immediately recognized by their much larger size. Riccardia innovans is thus far only known from the type. A field search by the second author in the type locality and elsewhere has not revealed further populations of the species. The taxonomic relationships of the species will be dealt with in a comprehensive study on the genus Riccardia in Guadeloupe (Lavocat Bernard & Reeb in prep.)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on pages 206-207, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144

Cheilolejeunea rigidula ( Mont.) R.M.Schust. Castanea 36 (2): 102 (1971). Cheilolejeunea falcata Steph., Species Hepaticarum 5: 655 (1914). Cheilolejeunea ovistipula Steph., Hedwigia 34: 244 (1895). Bastos (2017: 42, fig. 12). — Type: Guadeloupe, l’Herminier 124 (holo-, G[G00112875!]), syn. nov. DISTRIBUTION. — A species widespread in tropical America and Africa. Remarks Cheilolejeunea ovistipula is a phenotype of C. rigidula with rather large trigones and a relatively long lobule tooth. The record of C. ovistipula from Capesterre-Belle-Eau, Guadeloupe (Bastos 2017: “on isolated tree at the margin of banana plantation, 400 m, 3 April 2002, Schäfer-Verwimp & Verwimp 22500/ C”) presumably belongs to C. rigidula as well., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 209, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["BASTOS C. J. P. 2017. - O genero Cheilolejeunea (Spruce) Steph. (Lejeuneaceae, Marchantiophyta) nas Americas. Pesquisas, Botanica 70: 5 - 78."]}

Radula pallens (Sw.) Mont. Voyage dans l'Amérique Méridionale Botanique 71 (1839). Radula subsimplex Steph., Hedwigia 23: 130 (1884); Castle (1959: 21, fig. 22); Yamada (1980: 254, fig. 9). — Type: Guadeloupe, without collector (holo-, G[G00043857]!, c. andr.). Further collection: Guadeloupe, “leg. Germain, misit Dr. l’Herminier” (G[G00112875!]), syn. nov. Remarks Radula pallens is a widespread neotropical species, that has been misunderstood in the past and was considered endemic to Jamaica (Gradstein in press). Radula subsimplex is a phenotype of R. pallens with lobule margins not sinuate. Several Caribbean species of Radula described by Castle (1959) in the section “ Dichotomae ”, such as R. obovata Castle and R. varilobula Castle, are probably further synonyms of R. pallens., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 213, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["CASTLE H. 1959. - A revision of the genus Radula. Part II. Subgenus Acroradula, Section 3. Dichotomae. Journal of the Hattori Botanical Laboratory 21: 1 - 52."]}

Lejeunea pulverulenta (Steph.) M.E.Reiner Cryptogamie, Bryologie 26: 60 (2005). — Basionym: Taxilejeunea pulverulenta Steph., Type: Guadeloupe, l’Herminier s.n. (lecto-, designated by Reiner-Drehwald [2005], G[G00052572!]). Taxilejeunea linguifolia Steph. (“ linguaefolia ”) Species Hepaticarum 5: 471 (1914); Stephani, Icones Ineditae 10033. — Type: Guadeloupe, l’Herminier s.n. (lecto-, designated here, G[G00043994!], c.gyn.; isolecto- (?), without collector, G[G00043993!], ster.), syn. nov. Remarks Lejeunea pulverulenta is a rather rare neotropical species that is known from Guadeloupe, Guyana and the northern Andes (Reiner-Drehwald 2005; Gradstein in press). The latter author already suggested the present synonymy based on the description and illustration of T. linguifolia by Jovet-Ast (1949). Study of the types confirmed that the two species are identical. Both were collected by l’Herminier in Guadeloupe and were described by Stephani in the same fascicle of Species Hepaticarum, as members of the genus Taxilejeunea., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 213, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144

Frullania brasiliensis Raddi Crittogame Brasiliane 12 (1822). Frullania guadalupensis Steph. (“Gottsche ex Steph.”), Species Hepaticarum 4: 496 (1911). — Type: Guadeloupe, l’Herminier s.n. (lecto-, G[G00120036!], c. gyn. juv.; isolecto-, G[G00262943!], PC[PC0102248!]), syn. nov. Remarks Frullania guadelupensis has been reported from Brazil (Stotler 1969) and Colombia (Van Reenen et al. 1984; Vasco et al. 2002), hence is not endemic to Guadeloupe. Although mature perianths are lacking in the type material, the large plant size, the recurved, apiculate leaf tips, the narrowly recurved underleaf margins and the subentire female involucres indicate that the plants belong to the common F. brasiliensis. The latter species is widespread in the Neotropics (e.g., Stotler 1969; Gradstein & Costa 2003)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 210, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["GRADSTEIN S. R. & COSTA D. P. 2003. - The Hepaticae and Anthocerotae of Brazil. Memoirs of the New York Botanical Garden 87: 1 - 318."]}

Plagiochila bicornis Hampe & Gottsche Linnaea 25: 338 (1852[1853]). (fide Gradstein 2015). Plagiochila herminieri Steph. Remarks A species widespread in the West Indies (Heinrichs 2002, as P. herminieri)., Published as part of Gradstein, S. Robbert & Bernard, Elisabeth Lavocat, 2020, An evaluation of the endemic bryophyte flora of Guadeloupe, pp. 205-214 in Cryptogamie, Bryologie 20 (15) on page 212, DOI: 10.5252/cryptogamie-bryologie2020v41a15, http://zenodo.org/record/7822144, {"references":["GRADSTEIN S. R. 2015. - New synonyms and new lectotypifications in Neotropical Plagiochila (Marchantiophyta). Cryptogamie, Bryologie 36: 369 - 379. https: // doi. org / 10.7872 / cryb / v 36. iss 4.2015.369"]}

Frullania trigona L.Clark, Jovet-Ast & Frye (Figs 1, 4) The Bryologist 50: 52 (1947). — Type: Guadeloupe, Traces Hugues, “sur branchettes”, P. & V. Allorge s.n. (iso-, PC[PC0102212, PC0102211 (slide)]!). Remarks Frullania trigona is a member of subg. Frullania sect. Microphyllae (R.M.Schust.) Gradst., Lima & Ilk. -Borg., a small group of about ten species including three in the Neotropics (Lima et al. 2020). Characteristic of this section are the small, dioicous plants, less than 1 mm wide, with caducous leaf lobes, ocelli in leaf lobes (and sometimes in underleaves), and small, distant underleaves.Within this group, F.trigona stands out by scattered ocelli in leaves but not in underleaves, margins of leaves and underleaves distantly crenulate by projecting trigones,underleaves scarcely wider than the stem, and female bracts and bracteoles with entire margins. The species is only known from the type.

Harpalejeunea stricta Lindenb. & Gottsche) Steph. Species Hepaticarum 5: 259 (1913).— Type: Mexico, Veracruz, Mirador, Liebmann s.n., c. gyn. (isosyn-, G[G00115038, G0011539]!). Harpalejeunea herzogii Jovet-Ast, Feddes Repertorium Species Novae Regni Veg. 58: 19 (1955). — Type: Guadeloupe, “Carbet, sur rocher humide,” 15.II.1936, P. & V. Allorge s.n., c. gyn. (holo-, PC[PC0103158!]), syn. nov. Remarks Harpalejeunea stricta is a widespread neotropical species. Harpalejeunea herzogii is a phenotype with ciliate perianths; typical H. stricta has shortly toothed keels. In other respects, the two species are identical. Perhaps H. herzogii may be retained as a variety of H. stricta. In Brazil plants with ciliate perianths has been described as H. schiffneri S.W.Arnell (see Gradstein & Costa 2003), which may be a further synonym of H. stricta.