Cheilolejeunea adnata var. autoica Gradstein & Ilkiu-Borges (2009: 64)

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 : 82-83

2.2. Cheilolejeunea adnata var. autoica Gradstein & Ilkiu-Borges (2009: 64) .

Type:— FRENCH GUIANA. Sa ̧l, 53°11’W, 3°7’N, trail 3 in lowland rainforest, 200–400 m, on rotten log in much light, 26 June 1986, J.M. Bekker 2233-1 (holotype GOET).— Fig. 2N–V . Cheilolejeunea larsenii Mizutani (in Hattori & Mizutani 1969: 95), syn. fide Bastos & Gradstein (2020)

Plants dark brown to yellowish brown, 0.5–1.3 mm wide. Stems in cross section 60–110 µm in diameter, 7–8 epidermal cells in cross section, 16–30 × 12–18 µm; 9–10 medullary cells, 8–15 × 7–12 µm. Ventral merophytes 2 cells wide. Leaves imbricate, orbicular to ovate, fully flat, 440–680 × 340–500 µm; margin entire, apex rounded; cells smooth, inconspicuous trigones, intermediate thickenings frequent; basal cells ovate 25–35 × 18–30 µm, median cells 18–32 × 17–25 µm, marginal cells 11–15 × 6–9 µm. Lobules 1/5–1/4 the length of the lobe, bottle-shaped, free margin strongly involute, keel straight to slightly arched, apex with a tooth formed by one long and acute cell. Underleaves distant, suborbicular, 1.5–2.5 x wider than the stem, 220–270 × 170–240 µm, bifid to 1/3–1/2, with a V-shaped sinus, margin entire, base cuneate. Autoicous. Androecia terminal on short or long branch, 3–6 pairs of bracts globose. Gynoecia on short or long branch, without innovations, bracts oblong-obovate, 450 × 330 µm, apex rounded; bracteole oblong-obovate 480 × 250µm, margin entire, bilobed ca. 2/5 its length. Perianth with 4–5 keels, beak short. Vegetative reproduction unknown.

Distribution and habitat:—Pantropical, occurring in Venezuela, Guyana, Brazil ( Bastos 2017), Central and South Africa, India, and Southeast Asia ( Shu et al. 2015); recorded here as new to Panamá. In the study area, the species has been reported for the Puntarenas-Chiriquí province of Pacific dominion, growing in lower montane rainforest, between 1100–2390 m. The record of C. adnata var. autoica occurring in the Páramo ( Fig. 3 ), actually belongs to the Guajira province.

Notes:—The variety is very similar to var. adnata , but differs by the absence of caducous leaves and autoicous sexuality. It was initially described by Gradstein & Ilkiu-Borges (2009) and elevated to species level by Shu et al. (2015) and synonymous with C. larsenii , a species described from Thailand. Bastos & Gradstein (2020) again reduced it to varietal level, as they did not consider the differences with C. adnata sufficient for C. larsenii to be recognized as a different species.

Specimens examined:— BRAZIL. São Paulo: Ubatuba , 16 February 2004, Yano et al. 26946 ( SP) . Pernambuco: Cabo , 14 November 1984, Yano & Porto 9180 ( SP) . Espírito Santo: Santa Tereza , 23 November 1982, Yano et al. 4911 ( SP) . PANAMÁ. Chiriquí: Boquete , 3 September 1940, Svilha 425 ( NY) . VENEZUELA. Táchira: Parque Nacional El Tamá, 02 March 1976, Schuster & Ruiz-Terán 76-2294 ( F) .

Figures

FIGURE 2. Cheilolejeunea acutangula A. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); B& D. Shoot sections in ventral view; C. Perianth, E. Ventral merophyte; F. Leaf and lobule; G. Apex of lobule; H. Leaf lobe cells. Cheilolejeunea adnata var. adnata I. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); J. Shoot section in ventral view; K. Leaf and lobule; L. Ventral merophyte; M. Leaf lobe cells. Cheilolejeunea adnata var. autoica N. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth); O. Shoot section with gynoecia, in ventral view; P. Perianth with bracteoles; Q. Shoot apex with androecia, in ventral view; R. Ventral merophyte; S. Underleaf; T. Leaf and lobule; U. Lobules; V. Leaf lobe cells. Cheilolejeunea aneogyna W-X. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); Y. Shoot in ventral view; Z. Perianth with bracts and bracteole; AA. Ventral merophyte; BB. Lobule; CC. Leaf lobe cells.

FIGURE 3. Distribution of Cheilolejeunea acutangula, C.adnata var.autoica, C. adnata var.adnata, and C. aneogyna in Pacific dominion and Páramo province.