Crepidomanes trinerve (Baker) Dubuisson & Ebihara

Ahamada H. Saïd, Sabine Hennequin, Germinal Rouhan & Jean-Yves Dubuisson, 2017, Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Comoros, European Journal of Taxonomy 313, pp. 1-53 : 13-14

Crepidomanes trinerve (Baker) Dubuisson & Ebihara

Crepidomanes trinerve (Baker) Dubuisson & Ebihara in Dubuisson et al. , Acta Botanica Gallica, Botany Letters 160: 187 (2013b). – Trichomanes trinerve Baker, Flora of Mauritius and the Seychelles: 465 (1877). – Type: Mauritius, s. loc., s.d., H. Barkly and A.M. Barkly s.n. (holo-: K000228373!).

Trichomanes ambongoense Bonap. , Notes ptéridologiques 9: 13 (1920a). – Type: Madagascar, s. loc., s.d., H.Perrier de la Bâthie 7501 (lecto-: P00466414!; isolecto-: P00466408!, designated by Dubuisson et al. 2013b); s. loc., s.d., H.Perrier de la Bâthie 7769 (syn-: P00466412!, P00466413!); s. loc., s.d., H.Perrier de la Bâthie 7770 (syn-: P00466410!, P00466411!); s. loc., s.d., H.Perrier de la Bâthie 7771 (syn-: P00466409!, P00482601!).

Trichomanes angustilaciniatum Bonap. , Notes ptéridologiques 16: 11 (1925). – Type: Madagascar, s. loc., s.d., H.Perrier de la Bâthie 13756 (holo-: P00482604!; iso-: P00482603!).

Short description

Lithophytic, less often epiphytic; long-creeping filiform rhizomes, rootless and densely covered by dense black trichomes, bearing widely separated pending fronds; fronds with slightly winged stipes, up to 3.5(–5) cm long, flabellate to obovate, palmatisect to digitate, less often pinnatifid, with always, when dry, folds parallel to veins; sori few, paratactic, campanulate with a well dilated mouth.

Global distribution

Comoros, Madagascar, Mauritius, La Réunion.

Distribution in Comoros

Mayotte.

Additional specimens examined

COMOROS: MAYOTTE, Massif de Benara et Bépilipili, chemin de crête reliant les deux massifs, 9 Nov. 2002, F.Rakotondrainibe et al. 6651 (P00310478); Mont Tchaourembo, 13 Nov. 2002, F.Rakotondrainibe et al. 6682 (P00311398). NB: these specimens were used for the molecular phylogeny in Dubuisson et al. (2013b).

Note

Crepidomanes trinerve is often confused with the distinct C. minutum , the first being even considered as a synonym of the latter by Roux (2009). Both taxa are nevertheless clearly distinct based on the stipe which is terete and wingless in C. minutum and slightly but always winged in C. trinerve in addition to some sorus features ( Dubuisson et al. 2013b). Crepidomanes trinerve , initially considered as endemic to Mauritius, is thus also present in Comoros (and in Madagascar and La Réunion).