Cheilolejeunea tonduzana (Stephani) Ye et al. (2015: 326)

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 : 110

28. Cheilolejeunea tonduzana (Stephani) Ye et al. (2015: 326) .—

Archilejeunea tonduzana Stephani (1911: 721) .

Type:— COSTA RICA. Rio Naranjo, 200–250 m, March 1893, A. Tonduz 3016 (holotype G).— Fig. 17R–X .

Plants light green to light brown, 1.5–2.5 mm wide. Stems in cross section 120–210 µm in diameter, 15–18 epidermal cells, 12–28 × 9–21 µm; 17–28 medullary cells, 14–26 × 7–14 µm.Ventral merophytes 4–6 cells wide. Leaves imbricate, ovate, flat, 1000–1550 × 760–1150 µm, margin entire, apex rounded; cells generally mammillose on the dorsal side, conspicuous trigones; basal cells 18–54 × 10–27 µm, median cells 15–41 × 11–24 µm, marginal cells 9–20 × 6–13 µm. Lobules rectangular, 2/5–1/2 of leaf length, free margin flat. Underleaves (sub)imbricate, reniform, 300–850 × 560–1900 µm, 6–8.5 × stem width, margin entire, insertion deeply arched.Autoicous. Androecia on branches 2–5 pairs of bracts. Gynoecia with lejeuneoid innovations, bracts obovate, 1130 × 650 µm, apex acute, lobule bracts 880 × 80 µm. Perianth terete or with 4 weak to strong keels, beak absent to very short. Vegetative reproduction unknown.

Distribution:—Neotropical, occurring from Mexico to Bolivia, Antilles, and southeastern of Brazil (Gradstein 2021). This species is widely distributed in the study area, being generally found on tree trunks and branches in lower and upper montane rainforests, between 1900 to 3200 m, in the Guatuso-Talamanca, Puntarenas-Chiriquí, Magdalena, Cauca, and Sabana provinces of the Pacific dominion. The records of C. tonduzana occurring in the Páramo ( Fig. 19 ), actually belongs to the Cauca or Magdalena provinces.

Comments:—Morphologically, this species can be very similar to C. filiformis , differing by being autoicous, with large, rectangular leaf lobes (2/5–1/2 × leaf length) and broader reniform underleaves. It generally grows strongly attached to the substrate.

Specimens examined:— BRAZIL. Amazonas : NW of S „o Gabriel, 00°05-08’, 67°10’W, 21 July 1979, Schuster 70-20-1030 ( F) . COLOMBIA. Antioquia: Angelópolis , vereda San Isidro, 6°6’32.2”N, 75°43’22.3”W, 2015 m, 5 November 2016, Rodríguez 30 ( HUA) ; Caldas, vereda primavera, 6°3’50.4”N, 75°38’17.2”W, 1879 m, 8 October 2016, Pavas 111 ( HUA) ; Heliconia , vereda La Pradera, 6°14’30.3”N, 75°46’36”W, 1918 m, Rodríguez 1 ( HUA) ; Rionegro , sector El Tanque, 6°9’17.6”N, 75°23’16.3”W, 2071 m, Hernández 1539 ( HUA) . Boyacá: Duitama , vereda “El Volcán”, 2200 m, 27 October 1988, Schuster 88-1017 ( COL) ; Miraflores, vereda Sutarriba , 5°10’44.2”N, 73°11’50.1”W, 2182 m, 19 December 2011, Moreno 477 ( UPTC) ; Páez , vereda Yamonta, 1345 m, Bravo 894 ( JBB) ; Quindio: Circasia, finca San Agustin , 4°38’N, 75°39’, 1700 m, 15 April 2000, Orrego 335 ( COL) . Risaralda: Santa Rosa de Cabal , 4°50’N, 75°31W’, 2970 m, 4 February 1986, Wolf 1579 ( COL) . Santander: Suaita , 1700 m, 2 August 2001, Uribe 3960, 2960 A ( COL) . ECUADOR. Loja: Reserva Biológica San Francisco , 03°58’18”S, 79°04’14”W, 1900–3000 m, May 2001, Holz 297, 560 ( QCA) . PANAMÁ. Bocas del Toro: Changuinola , 3200 m, De García 319p. p. ( PMA) . VENEZUELA: Mérida: Capo Elias , 2300–2350 m, 28 January 1976, Schuster 76-805 ( F) .

Figures

FIGURE 17. Cheilolejeunea rigidula A-B. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); C. Shoot with androecia in ventral view; D. Perianth with bracts and bracteole; E. Shoot in ventral view; F. Ventral merophyte with underleaves; G. Leaf and lobule; H. Lobule; I. Underleaf; J. Leaf lobe cells with trigones. Cheilolejeunea schiavoneana K. Shoot in ventral view; L. Shoot in ventral view with caducous leaves; M. Ventral merophyte; N. Leaf and lobule; O. Lobule; P. Underleaf; Q. Leaf lobe cells with trigones. Cheilolejeunea tonduzana R. Cladograph of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); S. Shoot with perianth in ventral view; T. Ventral merophyte; U. Leaf and lobule; V. Lobule; W. Underleaf; X. Leaf lobe cells with trigones. Cheilolejeunea trifaria var. trifaria Y-Z. Cladographs of fertile plants (solid ellipse = androecia, open ellipse = gynoecia with perianth, U= gynoecia without perianth); AA. Shoot with perianths and androecia in ventral view BB. Perianth in ventral view; CC. Shoot with androecium in ventral view; DD. Ventral merophyte; EE. Leaf and lobule; FF. Lobule; GG. Underleaf; HH. Leaf lobe cells with trigones.

FIGURE 19. Distribution of Cheilolejeunea tonduzana and C. trifaria var. trifaria in the Pacific dominion and the Páramo province.