Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Comoros Author Ahamada H. Saïd Author Sabine Hennequin Author Germinal Rouhan Author Jean-Yves Dubuisson text European Journal of Taxonomy 2017 2017-04-28 313 1 53 journal article 32053 10.5852/ejt.2017.313 e9b8382f-faec-4925-993b-f13e4cfa2a71 2118-9773 896401 Didymoglossum lorencei (Tardieu) Ebihara & Dubuisson Didymoglossum lorencei (Tardieu) Ebihara & Dubuisson in Ebihara et al. , Blumea 51: 236 (2006). – Trichomanes lorencei Tardieu , Adansonia , sér. 2, 17 (2): 147, pl. 1, t. 7–13 (1977). – Type: Mauritius, D.H. Lorence 1175 (holo-: P00477828!). Short description Epiphytic or lithophytic; long-creeping filiform rhizomes, rootless and densely covered by dense black trichomes, bearing widely separated pending fronds; fronds sessile to subsessile, up to 1.5 cm long, oblong to obovate, entire with entire to undulate margins, with palmate venation and false veins parallel to true veins, hairy with dark not pedunculated trichomes on lamina margins; one single terminal sorus per fertile frond, cylindrical with lips usually parallel and with brown margins. Global distribution Comoros, Madagascar, Mauritius, La Réunion. Distribution in Comoros Mayotte, Mohéli. Additional specimens examined COMOROS: MAYOTTE, Mont Tchaourembo à 2.5 km au SE de la ville de Ouangani, 13 Nov. 2002, F.Rakotondrainibe et al. 6688 (P00311404). MOHÉLI, Piste entre Miringoni et le Chalet St Antoine, 4 Nov. 2008, G.Rouhan et al. 874 (P00684865). Note Didymoglossum lorencei has simple and entire fronds bearing marginal starred hairs and always a single sorus, while the morphologically close D. robinsonii (Hook. ex Baker) Copel. (presented here-after) has fronds often lobed to pinnatifid (see Fig. 2B ) and often more than one sorus.