Cheilolejeunea adnata var. adnata Grolle 1977
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 adnata
Cheilolejeunea adnata (lehmann) grolle (1977: 529) var. adnata

description: 2.1. Cheilolejeunea adnata (Lehmann) Grolle (1977: 529) var. adnata —
Jungermannia adnata Lehmann (1834: 46).
Type:— CUBA. In caduce Oreodoxae regiae, Pöppig s.n. (W, lectotype designated by Grolle 1977).— Fig. 2I–M.
Plants yellowish green to light brown, 0.6–0.9 mm wide. Stems in cross section 60–100 µm in diameter, 7–8 epidermal cells, 16–28 × 10–14 µm; 9–10 medullary cells, 9–16 × 5–11 µm. Ventral merophytes 2 cells wide. Leaves subimbricate to imbricate, generally orbicular to ovate, fully flat, 415–500 × 350–500 µm; margin entire; apex broadly rounded; cells orbicular to ovate, cuticle smooth, inconspicuous trigones; basal cells 22–27 × 15–21 µm, median cells 18–29 × 16–20 µm, marginal cells 11–16 × 9–11 µm. Lobules rectangular to ovate, 1/4 leaf length, free margin involute, tooth acute, formed by a cell long, straight to slightly curved, 10 × 25 µm, keel arched. Underleaves distant, orbicular, 1.5–2.5 x wider than the stem, 150–210 × 80–160 µm, bifid to 1/3–1/2, with a V-shaped sinus, margin entire, base cuneate. Dioicous. Androecia on branches, with 5 pairs of bracts. Gynoecia on branches, with a lejeuneoid innovation (sometimes absent), bracteoles obovate, 620 × 390 µm, bifid to 1/8. Perianth 3-keeled, the keels weak, beak short. Vegetative reproduction by means of caducous leaves with hyaline rhizoids on the margin.
Distribution and habitat:—Neotropical, occurring in the Caribbean islands, Costa Rica, Panamá, Colombia, Venezuela, Ecuador (Gradstein 2020, 2021), Guyana, Suriname, and Brazil (Bastos 2017). In the study area, generally grows epiphytic on tree trunks and shrubs, below 2000 m, in the lowland rainforest and lower montane rainforest, in the Puntarenas-Chiriquí, Guatuso-Talamanca, Trinidad, Magdalena, Cauca, Chocó-Darién, and Venezuelan provinces of Pacific dominion (Fig. 3).
Notes:—The species is easily distinguished by the presence of deciduous leaves with rhizoids on their margin, lobules ca. 1/4 of the length of the leaf, with a prominent tooth, and distant underleaves, slightly wider than the stem, orbicular, with cuneate bases.
Specimens examined:— BRAZIL. Acre: Alto Juruá, 8°56’11”S, 72°33’50”W, 28 November 2000, Costa 3904 (RB). Pernambuco: Recife, Dois Irm „os, 50 m, 3 August 1998, Costa 3366 (RB). COLOMBIA. Amazonas: Comunidad “ Peña Roja ”, 0°34’S, 72°08’W, 200 m, 14 July 2000, Idárraga, 2477 (HUA). Antioquia: Tarazá, 7°33’35.37”N, 75°24’59,41”W, 199 m, February 2017, Buitrago 609439 (COL). Cauca: Guapi, Isla Gorgona, 20 m, 11 November 1987, Aguirre-C. 6747 (COL). COSTA RICA: Guanacaste. Liberia, National Park Rincon de la Vieja, Trockenwald, 750-800 m, 1 Juary 2000, Schäfer-Verwimp & Holz SV /H-0405 (ALCB). PANAMÁ. Barro Colorado: Barro Colorado Island, 120 m, Salazar-A. 15142 (QCA). SURINAME. Nickerie: 5°N, 57°W, 150 m, Bekker 1355a (PMA).
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 page 82, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813