Cheilolejeunea lobulata Gradstein & Bastos 2020
Creators: name: Gil-Novoa, Jorge Enrique
name: Costa, Denise Pinheiro
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea lobulata

description: 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).
description: Published as part of 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, pp. 73-120 in Phytotaxa 587 (2) on pages 100-101, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813