Abrodictyum tamarisciforme (Jacq.) Ebihara & Dubuisson

2. Abrodictyum tamarisciforme (Jacq.) Ebihara & Dubuisson View in CoL ( Ebihara et al. 2006: 244), Fig. 7 View FIGURE 7

Trichomanes tamarisciforme Jacq. (von Jacquin 1791[1789]: 285). Type:— LA RÉUNION. ‘Sponte crescit in insula Borboniae’, without date, without collector ( holotype von Jacquin (1789): pl. 21, fig. 2). Note: The LINN specimen (LINN-HS1641-10) collected in La Réunion strongly resembles the illustration provided by von Jacquin, hence suggesting it could correspond to the original observed material.

= Trichomanes stylosum Poir. View in CoL ( Poiret 1808: 82). ≡ Selenodesmium stylosum (Poir.) Copel. View in CoL ( Copeland 1938: 81). ≡ Abrodictyum stylosum (Poir.) J.P.Roux View in CoL ( Roux 2009: 38). Type:— MADAGASCAR. Without locality, without date, L.-M.A. du Petit-Thouars s.n. ( lectotype P, P00482618!, here designated; isolectotype P, P00482633!).

= Trichomanes achilleifolium Bory ex Willd. View in CoL ( Willdenow 1810: 512), as ‘ achilleaefolium ’. Type:—“Ile de France & de Bourbon”, without date, J.B.G.M. Bory de St. -Vincent s.n. ( lectotype B, BW 20 214010!, here designated; isolectotype P, P00477829 !).

Short description—Epiphytic, more rarely lithophytic ferns. Rhizomes short-creeping, with robust roots and clustered erect fronds, becoming more or less pendant in epiphytic specimens; fronds well stipitate, up to 50 cm long, usually lanceolate, less often oblong or ovate, appearing often falciform because of a curved rachis, usually bi-pinnate-pinnatifid, less often tri-pinnate-pinnatifid, and linear ultimate segments with usually 4(5) rows of lamina cells on both sides of the veins including a clearly distinct margin ( Fig. 7D View FIGURE 7 ); sori numerous, paratactic, obconic, usually truncated or with a slightly dilated mouth; receptacle short to relatively long-exerted (up to 1 cm long).

Global distribution— Madagascar and Mascarenes.

Current distribution in Mascarenes— La Réunion, Mauritius.

Ecology—Usually epiphytic, often on tree-fern trunks ( Alsophila spp. ), less often lithophytic (especially on Mauritius), in the understory of rainforests, from low to middle elevations ( 250–1,700 m), more abundant in montane forests.

Specimens examined— MAURITIUS. Without locality, without date, without collector ( P01381686 ) ; without locality, without date, without collector ( P01381687 ) ; without locality, without date, P. Commerson s.n. ( P01485626 ) ; Pétrin, area above Black River Gorges , October 1974, Barclay 3329 ( MAU) ; Bar Le Duc , inside private hunting zone, December 2012, K. Pynee et al. s.n. ( MAU 0009261 About MAU ) ; Grand Bassin, Gouly Père Nature Reserve , October 2015, Gungadurdoss et al. s.n. ( MAU 0019238 About MAU ) ; Pétrin, State Land Raoul, next to road to Grand Bassin , February 2016, K. Pynee et al. s.n. ( MAU 0019004 About MAU , MAU 0019005 About MAU ) ; Brise Fer, Next Conservation Management Area , February 2016, K. Pynee et al. s.n. ( MAU 0011485 About MAU ) .

— LA RÉUNION. Plaine des Fougères , 1850, M. Boivin s.n. ( P01430194 ) ; without locality, before 1857, P. Commerson 1480 ( P00674943 ) ; without locality, without date, J. M. C. Richard 298 ( P01430186 ) ; Cilaos , November 1973, F. Badré 907 ( P01596683 ) ; Takamaka , May 1974, J. Bosser 22047 ( P01596685 ) ; Takamaka , May 1976, J. Bosser 22241 ( P01596679 ) ; Saint Philippe , Forêt de Mare Longue, April 1999, J.- Y. Dubuisson HR-1999-11 ( P) ; Saint Philippe , Forêt de Mare Longue, April 2002, J.- Y. Dubuisson HR-2002-15 ( P02433297 ) .

Note— Dubuisson et al. (2017) reported a clearly distinct lamina margin ( Fig. 7D View FIGURE 7 ) that allows distinguishing the species from other Abrodictyum in the western Indian Ocean.

Genus Crepidomanes (C.Presl) C.Presl View in CoL ( Presl 1849: 258)