Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America Author Gil-Novoa, Jorge Enrique Programa de Pós-graduação em Botânica, Escola Nacional de Botânica Tropical, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro. Rua Pacheco Leão, Horto, 2040, 22460 - 080, Rio de Janeiro-RJ, Brazil. & Grupo Sistemática Biológica, Herbario UPTC, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Boyacá, Colombia. Author Costa, Denise Pinheiro 0000-0001-9495-3029 Instituto de Pesquisas Jardim Botânico do Rio de Janeiro - IPJBRJ, Rua Pacheco Leão 915, 22460 - 030, Rio de Janeiro, RJ, Brazil. denisepinheirodacosta @ gmail. com; https: // orcid. org / 0000 - 0001 - 9495 - 3029 denisepinheirodacosta@gmail.com text Phytotaxa 2023 2023-03-14 587 2 73 120 http://dx.doi.org/10.11646/phytotaxa.587.2.1 journal article 234670 10.11646/phytotaxa.587.2.1 f3baa327-db9d-4576-b017-96a05242bbed 1179-3163 7731813 14. Cheilolejeunea inflexa (Hampe ex Lehm.) Grolle (1979: 174) .— Lejeunea inflexa Hampe ex Lehm. ( in Lehmann 1838: 22 ). Type:— WEST INDIES, inter muscos Indiae occidentalis reperit, ex hb. Hampe ( holotype S).— Fig. 10H–O . Cheilolejeunea mammifera Schuster (1980b: 429) , syn. fide Bastos (2016) Plants light brown, 0.7–1.5 mm wide. Stems in cross section 75–90 µm in diameter, 7 epidermal cells 21–30 × 13–18 µm; 9–11 medullary cells, 11–18 × 5–10 µm. Ventral merophytes 2 cells wide. Leaves subimbricate, ovate, flat, 440– 530 × 300–430 µm; margin entire or with few teeth near to apex, apex acute, dorsal margin usually strongly arched at middle, ventral margin somewhat recurved; cells long-hexagonal to orbicular, strongly papillose on the dorsal side, conspicuous trigones; basal cells 17–35 × 8–19 µm, median cells 16–33 × 13–20 µm, marginal cells 10–21 × 8–14 µm. Lobules small to median, 1/4–1/3 of leaf length, rectangular to ovate, tooth recurved, long, and acute, 25 × 10 µm, free margin involute, keel arched, strongly crenate, with large projecting papillae. Underleaves distant, ovoid, 200–320 × 200–280 µm, 3–4.5 × stem width, bifid to 1/3–1/5, base cordate, insertion arched. Autoicous. Androecia on short-specialized branches or intercalary on long shoots, with 4–6 pairs of bracts globose. Gynoecia with innovations pycnolejeuneoid, bracts obovate, 400 × 300 µm, apex rounded; lobule 180 × 80 µm, bracteole ovate 330 × 270 µm, bifid to 1/3, generally recurved. Perianth obovoid, inflated, with 5 rounded and crenulate keels, apex rounded or slightly truncate, beak short. Vegetative reproduction unknown. Distribution and habitat :—Neotropical, occurring in Cuba , Dominica , Guadalupe , Jamaica , Costa Rica , Guatemala , Colombia Venezuela , and Brazil ( Bastos 2017 , Grolle 1979 , Ye & Zhu 2009 ). This species grows as an epiphyte on tree trunks in the study area, in savanna, deciduous forests, lower and upper montane rainforests, between 1100–2600 m , in the Guatuso-Talamanca, Puntarenas-Chiriquí, Guajira, Magdalena, Cauca, Chocó-Darién, and Venezuelan provinces of the Pacific dominion ( Fig. 11 ). Notes :—The species is characterized by having leaves with an acute and curved apex, large papillae that are easily seen on the lobule keel, underleaves 3–4 × stem width, and underleaf base cordate. FIGURE 11 . Distribution of Cheilolejeunea holostipa , C. inflexa , C. intertexta , and C. jackii in Pacific dominion and Páramo province. Specimens examined :— COLOMBIA . Antioquia : Carmen de Viboral , 5°52’N , 75°20’W , 2100–2600 m , 20 June 1991 , Callejas 10221 ( HUA ) . Guatapé , 6°14’N , 75°10’W , 1850 m , 28 June 1997 , Gutiérrez 1311, 1312, 1315, 1316 ( HUA ) . Chocó : Unguía , Cerro Tacarcuna , 1115 m , 2 April 2017 , Gil-Novoa 3358 ( UPTC ) . Huila : Acevedo , Macizo colombiano, 1°36’21”N , 76°6’16”W , 1800 m , 29 November 2001 , Castillo 2404b ( HUA ) , 2505e (COL). Magdalena : Santa Marta , cuchilla de San Lorenzo , 2100 m , 12 January 1997 , Winkler C360 ( COL ) . Risaralda : Chocó Biogeographical Region , west side of cordillera Occidental , 1500 m , 25 July 1992 , Gradstein 8420 ( COL ) . Santander : Bolívar , La Hermosura , 06°08’05.9”N , 73°49’19.7”N , 1633 m , Gil-Novoa 2250 ( UPTC ) ; El Vocan , 27 October 1988 , Schuster 88-1004 ( F ) . VENEZUELA . Bolívar : Cerro Venamo , 1000 m , 27 December 1963 , Steyermark 92256 ( NY ) .