Cheilolejeunea holostipa (Spruce) Grolle & Zhu (2001: 1071)

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 : 94-95

13. Cheilolejeunea holostipa (Spruce) Grolle & Zhu (2001: 1071) .—

Lejeunea holostipa Spruce (1884: 171) .

Type:—BRAZIL. Pará, Spruce L219 (MANCH!, lectotype designated by Grolle & Reiner-Drehwald 1999).—Fig. 10A–G.

Plants light brown, 0.3–5 mm wide. Stems in cross section 80–100 µm in diameter, 7 epidermal cells and 4–6 medullary cells. Ventral merophytes 2 cells wide. Leaves subimbricate to imbricate, ovate, flat to slightly concave, 230–300 × 200–250 µm; margin entire, apex rounded, dorsal and ventral curved; cells orbicular to ovate, conspicuous trigones (but not very large); basal cells 12–22 × 16–18 µm, median cells 16–18 × 13–16 µm, marginal cells 10–13 × 6–8 µm, smooth. Lobules large, 1/2 of leaf length, ovate, more or less inflated, tooth acute, formed by one long cell, 27 × 6 µm, free margin involute, keel curved, and terminal tooth acute. Underleaves distant, orbicular, 90–100 × 100–110 µm, 1.5–2 × stem width, entire, insertion base cuneate. Dioicous. Androecia in principal stem, with 2–5 pairs of bracts. Gynoecia on short shoots with innovations pycnolejeuneoid, bracts obovate, 400 × 300 µm, apex rounded; lobule 180 × 80 µm, bracteole ovate 330 × 270 µm, bifid to 1/3, generally recurved. Perianth with 5 weak to strong keels in the upper half of the perianth, beak long. Vegetative reproduction unknown.

Distribution and habitat:—Neotropical, occurring on Caribbean islands, Mexico, Honduras, Costa Rica, Panamá, Colombia, Venezuela, Guianas, Ecuador, Peru, and Brazil ( Bastos 2017, Schäfer-Verwimp 1999). This species grows on tree trunks in the study area, in lowland rainforest, lower and upper montane rainforests, between 700–3000 m, in the Guatuso-Talamanca, Puntarenas-Chiriquí, Guajira, Magdalena, and Cauca provinces of the Pacific dominion. The record of C. holostipa occurring in the Páramo ( Fig. 11 ), actually belongs to the Cauca province.

Notes:—This species can be recognized as small plants (<600 µm wide), with ventral merophytes 2 cells wide and underleaves distant and fully entire. The section Cyrtolejeunea is composed of two species in the Neotropics, C. holostipa and C. insecta ; the latter species differs by a slightly bifid underleaf and the presence of bracteoles throughout the male spike ( Bastos & Gradstein 2020) and does not occur in the study area.

Specimens examined:— BRAZIL. Pará: Capit „o Poço , 1°46’S, 47°4’W, 40 m, 15 September 2016, Tavares 1025 ( RB) . Rio de Janeiro: Rio de Janeiro, PARNA Tijuca , 22°57’28”S, 43°16’40”W, 446 m, 19 July 2016, Santos 551 ( RB) . Santa Catarina: Blumenau, Nova Rússia , 27°3’7”S, 49°5’16”W, 281 m, 17 November 2003, Costa 4687 ( RB) . COLOMBIA. Antioquia: Cocorna , 6°2’40.29”N, 75°7’46.46”W, 964 m, 19 August 2016, Ordoñez 251 ( HUA) ; San Luis , 811 m, 12 June 2018, Carvajal 11 ( HUA) ; Santo Domingo , January 2018, Ordoñez 625 ( HUA) . Cundinamarca: Ubalá , 754 m, 26 July 2018, Carmona s.n. ( HUA) . Magdalena: Santa Marta, Cuchilla de San Lorenzo , S. Winkler C227 ( COL) . Risaralda: El Pital , 4°51’N, 75°45’W, 1500 m, 8 November 1986, Wolf 1226 ( COL) . Santa Rosa de Cabal , 4°50’N, 75°31.5’W, 2740 m, 4 June 1986, Wolf 1572 ( COL) . ECUADOR. Loja: Loja, Parque Nacional Podocarpus , 2700 m, 11 November 2009, Gradstein 12261 ( QCA) . PANAMÁ. Chiriqui: Straβe von El Volcán , 8°49,67’ N, 82°42.85’ W, 1220 m, 3 April 2013, Schäfer-Verwimp & Werwimp 34702 ( ALBC) .

Figures

FIGURE 11. Distribution of Cheilolejeunea holostipa, C. inflexa, C. intertexta, and C. jackii in Pacific dominion and Páramo province.