Hymenophyllum hirsutum

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 : 23-24

Hymenophyllum hirsutum (L.) Sw.

Hymenophyllum hirsutum (L.) Sw., Journal für die Botanik 1800: 99 (1801). – Trichomanes hirsutum L., Species plantarum 2: 1098 (1753). – Type: based on Plumier (see Cremers & Aupic 2008), ‘ Plum. fil. 73, t. 50, fig. B; Pet. fil. 105, t. 15, fig. 5. Habitat in America’ (lecto-: Traité des fougères de l’Amérique ( Plumier 1705), t. 50, fig. B, designated by Morton 1947); Plumier in herbier Tournefort 5315­1 (epi-: P-TRF P00322153!, designated by Cremers & Aupic 2008).

Trichomanes ciliatum Sw. , Nova genera & species plantarum. Prodromus : 136 (1788). – Type: ‘Habitat in Jamaica’, O. Swartz s.n. (holo-: S; iso-: B-W 20222).

Hymenophyllum ciliatum (Sw.) Sw. , Journal für die Botanik 1800: 100 (1801).

Hymenophyllum boryanum Willd. , Species plantarum: 518, 519 (1810). – Type: ‘Habitat in insula Borboniae’ J.B.G.M. Bory de St.­Vincent s.n. (holo-: BW 20240010!; iso-: P00477832!). Note: The holotype specimen was considered by Roux (2009) as synonym of H. capillare , but it is clearly H. hirsutum , explaining why we consider here this species as synonym of the latter one; it is also the case of the P isotype but in the specimen noted B, the second frond from the right belongs to H. capillare .

Sphaerocionium ciliatum (Sw.) C.Presl, Eine botanische Abhandlung: 34 (1843).

Sphaerocionium hirsutum (L.) C.Presl, Eine botanische Abhandlung: 34 (1843).

Hymenophyllum ciliatum (Sw.) Sw. var. boryanum (Willd.) Mett. ex Kuhn, Filices Africanae : 39 (1868).

Hymenophyllum ciliatum (Sw.) Sw. var. imbricatum Bonap. , Notes ptéridologiques 14: 200 (1923) – Type: Gabon, G. Le Testu 2160 (holo-: P00483495!; iso-: P00483494!).

Hymenophyllum ciliatum (Sw.) Sw. var. majus Tardieu, Flore de Madagascar et des Comores, 3e famille Hymenophyllacées: 14 (1951). – Type: Madagascar, mont Tsaratanana, H.Perrier de la Bâthie 16451 (lectotype, here designated: hololecto-: P01315030!; isolecto-: P01315029!).

Short description

Epiphytic; long-creeping filiform rhizomes, bearing sparsely distributed roots and long reddish brown trichomes, and widely separated pending fronds; fronds with winged stipes and rachises, up to 13 cm long, lanceolate to triangular, pinnate-pinnatifid to bipinnate-pinnatifid, densely hairy with reddish brown, starred, pedunculated trichomes on stipes, rachises, veins and margins; numerous sori, paratactic, bilabiate without a developed base and with hairy margins.

Global distribution

Western Indian Ocean, tropical Africa, Neotropics.

Distribution in Comoros

Anjouan, Grande Comore, Mohéli.

Additional specimens examined

COMOROS: ANJOUAN, s. loc., 1886, L.Humblot 1545bis (P00139605); s. loc., 1905?, M.Lavanchie s.n. (P00139607); Sommet du Tringi, 12 Nov. 2009, M. Pignal et al. 3727bis (P02439801); Mjimandra, 1 Apr. 2011, E. Bidault et al. 111 (P02439774). GRANDE COMORE, Nioumbadjou, 1911, L.Humblot s.n. (P00139606, P01314979); Base du Massif du Karthala, 10 Jun. 2006, J.­N.Labat et al. 3806 (P00527429); Versant ouest du volcan Karthala, bois proche de Convalescence, 24 Oct. 2008, M.Pignal et al. 3386bis (P02439788); Nfudo ya Mdrunda, au-dessus du village de Tsinimwapanga, 29 Nov. 2009, C.Loup et al. 545 (P02439777); En descendant du lieu dit Shihafuni vers le village de Tsinimwapanga, 29 Nov. 2009, C.Loup et al. 562 (P02439780). MOHÉLI, Chalet St Antoine, 5 Nov. 2008, M.Pignal et al. 3487 (P02439796); Au-dessus de Drondroni, 26 Mar. 2011, C.Loup et al. 601 (P02439784).

Note

The sheet P01315030 consists of many individuals with several fertile fronds, and specimens are representative of the morphology of the species. Contrary to the other sheet (P01315029), the label is provided with full collect details by the collector Perrier de la Bâthie, and it was definitely examined by Tardieu-Blot as evidenced by the handwritten annotation ‘ Hymenophyllum ciliatum var. majus Tardieu’. For all these reasons, P01315030 was selected as the lectotype specimen for the latter name.