Cheilolejeunea lobulata (Lindenberg) Gradstein & Bastos (2020: 29)

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 : 100-101

19. Cheilolejeunea lobulata (Lindenberg) Gradstein & Bastos (2020: 29) .—

Lejeunea lobulata Lindenberg (in Gottsche et al. 1845: 353).

Type:— ST. KITTS, “St. Christopher”, Breutel s.n. (isotype G).— Fig. 12S–Z .

Cheilolejeunea nana Schuster (1978: 426) , syn. fide Bastos & Gradstein (2020)

Cheilolejeunea oncophylla (Ångstrom 1876: 86) Grolle & Reiner (1997: 781) , syn. fide Bastos & Gradstein (2020)

Plants light brown to almost yellowish, 0.6–0.9 mm wide. Stems in cross section 60–100 µm in diameter, 7–8 epidermal cells, 113–25 × 18–29 µm; 10–16 medullary cells, 9–18 × 5–11 µm. Ventral merophytes 2 cells wide. Leaves distant to contiguous, ovate to ovate, slightly concave, 330–410 × 240–330 µm; margin entire, apex rounded to obtuse, dorsal margin curve; cells slightly mammillose on the dorsal side and with a low papilla, conspicuous trigones; basal cells 18–27 × 12–18 µm, median cells 17–27 × 12–20 µm, marginal cells 10–18 × 9–16 µm. Lobules inflated, ovate to rectangular, 1/3–2/5 of leaf length, free margin involute, apical tooth acute formed by a long cell, 15–22 × 9–15 µm, keel arched, crenate by mammillose cells. Underleaves distant, orbicular to ovate, 130–200 × 120–170 µm, 1.5–2.5 × stem width, bifid to 1/3 to 1/2, with a V-shaped sinus, margin entire, base cuneate. Autoicous or dioicous. Androecia axillary or terminal, 1–3 pairs of bracts. Gynoecia with pycnolejeuneoid innovations, bracts obovate, 510–550 × 300– 330 µm, apex acute, lobule 300 × 100 µm, bracteole ovate, 390–420 × 350–450 µm, bifid to 1/3. Perianth 5-keeled, generally with very strong keels, beak long.

Distribution and habitat:—Neotropical, occurring in Caribbean islands, Costa Rica, Colombia, Venezuela, Peru, Bolivia, Brazil, and Argentina ( Bastos 2017, Grolle & Reiner- Drehwald 1999). This species is widely distributed in the study area, growing as an epiphyte on tree trunks and branches, in the inter-Andean desert and in semi-desert vegetation, lowland rainforest, lower and upper montane rainforests, grass páramos, and shrub and cushion páramos, between 200–4000 m, in the Guatuso-Talamanca, Puntarenas-Chiriquí, Guajira, Magdalena, and Cauca provinces of the Pacific dominion, and in the Páramo province of SATZ ( Fig. 13 ).

Notes:—A variable species, characterized by leaves slightly concave, the apex rounded to obtuse, cells mammillose on the dorsal side whit a low papilla (see Gradstein 2021, Gradstein & Bastos 2022), with conspicuous trigones, and underleaves distant, small 1.5–2 × width stem, bifid up to 1/3, base cuneate, and occasionally with vegetative reproduction by branches caducous ( Grolle & Reiner-Drehwald 1997). This species can be confused with C. acutangula (see Gradstein & Bastos 2021) but the latter has usually acute leaf apices (not rounded to obtuse) and larger underleaves, 2.5–4 × stem width (not 1.5–2×).

Specimens examined:— BRAZIL. Rio de Janeiro: Itatiaia , 2400 m, 12 April 2000, Costa 3831 ( RB) ; Rio de Janeiro, Parna Tijuca , 22°56’51”S, 43°17’30”W, 507 m, 19 April 2006, Santos 456 ( RB) ; Teresópolis , Parna Serra dos Órg „os, 22°27’66”S, 43°19’90”W, 20 March 2007, Costa 4679 ( RB). São Paulo: Cubat „o, 23°51’41”S, 46°27’51”W, 780 m, 27 January 2017, Prudêncio 457 ( RB) . COLOMBIA. Antioquia: Guatapé , 6°14’N, 75°10’W, 1850 m, 28 June 1997, Gutierrez 1281 ( HUA) ; La Estrella, 6°8’50.4”N, 75°37’47.3”W, 1697 m, Odoñez 151 ( HUA) ; Medellín, Santa Elena , 6°15’13”N, 72°30’42”W, 2528 m, 30 July 2005, Londoño 132 ( HUA) ; Santo Domingo , 1080 m, 24 October 2017, Ordoñez 635 ( HUA) ; Sonsón , 5°43’25.1”N, 75°21’35.7”W, 2641 m, 02 November 2013, Arango 177 ( UDBC) . Cundinamarca: Páramo El Tablazo, 3500 m, 20 October 1988, Thiers 5487 ( COL) . Casanare: Sacama, Road Socha– Sacama , 3050 m, 4 August 2017, Gradstein 12712 ( COL, UPTC) . Huila: Acevedo, Macizo colombiano, 1°36’59”N, 76°6’15”W, 2100 m, 29 November 2001, Castillo 2340 A ( HUA) . Risaralda: Santa Rosa de Cabal , 4°50’N, 75°31’W, 2970 m, 22 January 1986, Wolf 643, 723 ( COL) . Tolima: Santa Isabel , 2950–3520 m, 29 July 1980, Aguirre-C 1517, 1618 ( COL) . COSTA RICA. San José: Cerro de la Muerte , 3350 m, 26 December 1999, Schäfer-Verwimp & Holz SV / H-0160 ( ALCB) . ECUADOR. Carchi: El Angel - Tulcan Rd., Voladero , 3900 m, 10 April 1987, Thiers 4445 ( QCA) . Loja: Parque Nacional Podocarpus , 2700, 11 November 2009, Gradstein 12262 ( QCA) ; Parque Nacional Podocarpus , 4°07’S, 79°10’W, 2900 m, 22 January 2011, Schafer-Verwimp 31820/ A ( QCA) . Zamora - Chinchipe: Parque Nacional Podocarpus , 3000–3100 m, 27 April 2008, Burghardt 7098 ( QCA) . VENEZUELA. Mérida: Sierra Nevada de Mérida , February 1976, R. M. Schuster 76-1450 ( F) ; National Park Sierra Nevada , 3450 m, Schäfer-Verwimp & Verwimp 12325 ( ALCB) . Tachira: s. of Villa Paez, Betania , 2560 m, 2 March 1976, Schuster 76-2065b ( F) .

Figures

FIGURE 12. Cheilolejeunea laevicalyx A-B. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); C. Shoot with gynoecia in ventral view; D. Shoot section in ventral view; E. Ventral merophyte; F. Leaf and lobule; G. Lobule; H. Underleaf; I. Leaf lobe cells with trigones; Cheilolejeunea lineata J-K. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); L. Shoot section in ventral view; M. Ventral merophyte and underleaves; N. Leaf and lobule; O. Lobule; P. Border leaf cells; Q. Underleaf; R. Leaf lobe cells with trigones. Cheilolejeunea lobulata S. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); T. Shoot with gynoecia in ventral view; U. Perianth; V. Shoot with androecia W. Ventral merophyte; X. Apex of lobule; Y. Underleaves; Z. Leaf lobe cells with trigones. Cheilolejeunea norisiae AA. Shoot section in ventral view; BB. Ventral merophyte; CC. Leaf and lobule; DD. Underleaves; EE. Leaf lobe cells with trigones.

FIGURE 13. Distribution of Cheilolejeunea laevicalyx, C. lineata, C. lobulata, C. norisiae, and C. ornata in Pacific dominion and Páramo province.