Cheilolejeunea inflexa (Hampe ex Lehm.) Grolle (1979: 174)

Gil-Novoa, Jorge Enrique & Costa, Denise Pinheiro, 2023, Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America, Phytotaxa 587 (2), pp. 73-120 : 95-96

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.

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) .

Figures

FIGURE 10. Cheilolejeunea holostipa A, B. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); C. Shoot section in ventral view; D. Perianth with bracts and bracteole; E. Ventral merophyte with lobule; F. Leaf and lobule; G. Leaf lobe cells. Cheilolejeunea inflexa H-I. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); J. Shoot section in ventral view; K. Portion of stem with perianth, L. Leaf and lobule, M. Apex of the lobule; N. Ventral merophyte with underleaf; O. Leaf lobe cells with trigones. Cheilolejeunea intertexta P. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); Q-R. ventral view of apex of the stem, S. Perianth with bracts and bracteole, T. Ventral merophyte with underleaf; U. Leaf and lobule, V. Lobule, W. Underleaves, X. Leaf lobe cells. Cheilolejeunea jackii Y. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth), Z-AA. Shoots section in ventral view, BB. Ventral merophyte, CC. Leaves and lobules, DD. Underleaf, EE. Leaf lobe cells with trigones.

FIGURE 11. Distribution of Cheilolejeunea holostipa, C. inflexa, C. intertexta, and C. jackii in Pacific dominion and Páramo province.