Crepidomanes inopinatum var. tamonii Y. Robert & Dubuisson
Creators: name: Dubuisson, Jean-Yves
name: Pechon, Timothée Le
name: Bauret, Lucie
name: Rouhan, Germinal
name: Reeb, Catherine
name: Boucheron-Dubuisson, Elodie
name: Selosse, Marc-André
name: Chaussidon, Cécile
name: Dajoz, Isabelle
name: Pynee, Kersley
name: Grangaud, Edmond
name: Robert, Yannis
name: Tamon, Jean- Maurice
name: Hennequin, Sabine
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Crepidomanes
Crepidomanes inopinatum
Crepidomanes inopinatum (pic.serm.) j.p.roux var. tamonii y. robert &amp; dubuisson

description: 8. Crepidomanes inopinatum (Pic.Serm.) J.P.Roux var. tamonii Y. Robert & Dubuisson (Dubuisson et al. 2014: 165,   
166), Fig. 10B  
 Type:— LA RÉUNION. La Possession, ravine de la Grande Chaloupe, August 2006, Y. Robert 913 (holotype P, P02433924!; isotype REU!)   
Short description—Similar to the typical variety but usually lithophytic with dwarf fronds up to 4 cm long and often when dry, folds parallel to veins.  
Global distribution— La Réunion, one population reported in Mauritius.  
Ecology—Lithophytic on wet and shaded rocks in wet ravines of the western side in semi-dry forest remnants, in addition to a few populations in locally-called ‘végétation de fond de cirque’ in north-eastern side (‘Rivière du Mât’ or ‘Mare à Poule d’eau’), at low elevations (150–900 m).  
 Specimens examined— MAURITIUS. Curepipe, Trou aux cerfs, October 2015, Pynee et al. s.n. (MAU 0017487, MAU 0017488).   
 — LA RÉUNION. Vallée de la Grande Chaloupe, La Montagne, October 1972, T. Cadet 3810 (REU08464); Ravine des Avirons, August 2005, E. Grangaud 1688-1; Sentier du Petit Louis, Grand Bassin, June 2006, Y. Robert 885; Tampon, sentier Piton Petit Louis vers Grand-Bassin, June 2006, Y. Robert s.n .; Sainte Marie, ravine Kiwi, July 2006, Y. Robert 890; Bras Panon, berges de la rivière du Mât, July 2009, Y. Robert 1298; Salazie, mare à Poule d‘eau, August 2009, Y. Robert 1317 ; Saint Louis, les Canots, January 2014, Y. Robert 1655; Saint Leu, ravine du Trou, December 2005, Tamon & Fontaine s.n.; Sainte Marie, falaise du Cap Soldat, October 2007, Tamon s.n.; La Possession, Ilet Solitude, december 2007, Tamon s.n; La Possession, Sentier de Dos d‘Ane vers Deux bras, March 2010, Tamon s.n. Note: Except T. Cadet 3810 available in REU, the holotype available at P and the Mauritian specimens, all other examined specimens are available in respective private collections of E. Grangaud, Y. Robert and J.- M. Tamon (La Réunion).   
 Note—As Dubuisson et al. (2013, 2014) have shown, this dwarf variety can easily be confused with C. trinerve, found in equivalent lowland habitats, especially when specimens show laminar folds parallel to veins. Subtle differences concern the sori, which exhibit a slightly dilated mouth vs. a well dilated bilabiate mouth for C. trinerve (see Fig. 11B), and laminar cells, which have straight walls vs. undulated wavy walls for C. trinerve (see Figs 2 and 3 in Dubuisson et al. 2013). A population was observed in Mauritius for the first time in 2015 (see above).
description: Published as part of Dubuisson, Jean-Yves, Pechon, Timothée Le, Bauret, Lucie, Rouhan, Germinal, Reeb, Catherine, Boucheron-Dubuisson, Elodie, Selosse, Marc-André, Chaussidon, Cécile, Dajoz, Isabelle, Pynee, Kersley, Grangaud, Edmond, Robert, Yannis, Tamon, Jean- Maurice & Hennequin, Sabine, 2018, Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications, pp. 1-58 in Phytotaxa 375 (1) on pages 20-21, DOI: 10.11646/phytotaxa.375.1.1, http://zenodo.org/record/13727979