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 Genus Trichomanes L. ( Linnaeus 1753 ) As evidenced by Bauret et al. (2015) , several paleotropical species formerly attributed to Trichomanes (the genus is mostly neotropical) are morphologically close to Abrodictyum spp. However, the single Comorian species T. boivinii Bosch is clearly distinct from Abrodictyum pseudorigidum occurring in the archipelago (see Fig. 4 ). The rhizomes of T. boivinii are short-creeping while those of Abrodictyum pseudorigidum are mostly suberect to erect. The main differences concern the ultimate segment shape. In T. boivinii , ultimate segments are multi-veined, ovate, spatulate and more or less toothed. In Abrodictyum pseudorigidum , ultimate segments are uni-veined, linear, and entire with tapered ends. Compared to Tardieu-Blot (1951) and Roux (2009) , T. boivinii is new for the archipelago, although the species had already been reported by Kuhn (1868) .