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 kirkii (Hook.) Ebihara & Dubuisson Didymoglossum kirkii (Hook.) Ebihara & Dubuisson in Ebihara et al. , Blumea 51: 236 (2006). – Trichomanes kirkii Hook. in Hooker & Baker , Synopsis filicum 3: 78 (1867). – Type: ‘Comoro Isl., Johanna Isl.’, J. Kirk s.n . (holo-: K000435666!). Crepidomanes seu Microgonium kirkii (Hook.) Copel., The Philippine Journal of Science 67: 104 (1938), nom. nud. Note: these combinations were never validly published but just suggested in a synonym list by Copeland, and were nevertheless cited by Tardieu-Blot (1951) . Short description Lithophytic or epiphytic; long-creeping filiform rhizomes, rootless and densely covered by dense black trichomes, bearing widely separated pending fronds; fronds well stipitate, up to 9 cm long, lanceolate to obovate, entire with undulate margins to mostly pinnate, less often pinnate-pinnatifid or bipinnate, with pinnate venation, and false veins parallel to true veins in addition to a submarginal false vein; few sori at the apex of pinnae, epitactic, cylindrical with a slightly dilated mouth. Global distribution Comoros. Distribution in Comoros Anjouan, Grande Comore, Mayotte, Mohéli. Additional specimens examined COMOROS: [ANJOUAN?], s. loc., 1886, L.Humblot 1552 (P00139630, P00139631, P00139632, P00312476). ANJOUAN, s. loc., May 1850, LH.Boivin s.n. (P00301470, P00301471); s. loc., 1905?, M.Lavanchie s.n. (P00301469). GRANDE COMORE, Base du Massif du Karthala, 10 Jun. 2006, J.­N.Labat et al. 3807 (P00527430); Versant ouest du volcan Karthala, bois proche de Convalescence, 24 Oct. 2008, M.Pignal et al. 3401 (P02439792); Massif forestier à l’ouest de la route régional 125 (départ de la piste à 2–3 km au sud de Tsinimouapanga), 10 Nov. 2008, G.Rouhan et al. 925 (P00684886). MAYOTTE, Qualey, Aug. 1847, L.H.Boivin 2883 (P00312471); Combani, Le long du Mroni Mouala, 17 Apr. 1999, M.Pignal et al. 1209 (P00139596); Rivière Camboni, 12 Nov. 2002, F.Rakotondrainibe et al. 6673 (P00311387). MOHÉLI, Piste entre Miringoni et le Chalet St Antoine, 4 Nov. 2008, G.Rouhan et al. 879 (P02439804); Chalet St Antoine, 5 Nov. 2008, M.Pignal et al. 3485 (P02439795). Note Didymoglossum kirkii , the only Hymenophyllaceae endemic to the Comoros, is the largest Comorian Didymoglossum species with fertile stipitate fronds up to 9 cm long which are entire or most often pinnatifid, or pinnate to bipinnate ( Fig. 3A ). In addition, rachises are often clearly distinct in D. kirkii compared to other Didymoglossum species.