Hymenophyllum hirsutum

Dubuisson, Jean-Yves, Pechon, Timothée Le, Bauret, Lucie, Rouhan, Germinal, Reeb, Catherine, Boucheron-Dubuisson, Elodie, Selosse, Marc-André, Chaussidon, Cécile, Dajoz, Isabelle, Pynee, Kersley, Grangaud, Edmond, Robert, Yannis, Tamon, Jean- Maurice & Hennequin, Sabine, 2018, Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications, Phytotaxa 375 (1), pp. 1-58 : 33-34

publication ID

https://doi.org/ 10.11646/phytotaxa.375.1.1

persistent identifier

https://treatment.plazi.org/id/03B0A579-7408-9674-25DE-FBC6FEBE6C76

treatment provided by

Felipe

scientific name

Hymenophyllum hirsutum
status

 

21. Hymenophyllum hirsutum View in CoL (L.) Sw. ( Swartz 1800: 99), Fig. 16A–C View FIGURE 16

Trichomanes hirsutum View in CoL L. ( Linné 1753: 1098). ≡ Sphaerocionium hirsutum View in CoL (L.) C.Presl ( Presl 1843: 34). Type:—based on Plumier (see Cremers & Aupic 2008), ‘Plum. fil. 73, t.50, f.B; Pet. fil. 105, t.15, f.5. Habitat in America’ (lectotype: Traité des fougères de l’Amérique (1705), t. 50, fig. B, designated by Morton 1947); Plumier in herbier Tournefort 5315-1 (epitype P-TRF, P00322153!, designated by Cremers & Aupic 2008).

= Trichomanes ciliatum Sw. View in CoL ( Swartz 1788: 136). ≡ Hymenophyllum ciliatum (Sw.) Sw. View in CoL ( Swartz 1800: 100). ≡ Sphaerocionium ciliatum (Sw.) C.Presl View in CoL ( Presl 1843: 34). Type:— JAMAICA. Without locality, without date, O. Swartz s.n. (lectotype S, S-R-2960!, inadvertently designated by Proctor (1985); isolectotypes B, BW 20 222010!, LD, LD1773824!). Note: The combination Hymenophyllum ciliatum (Sw.) Fosberg View in CoL , coined by Fosberg (in Fosberg & Sachet 1980: 1) and listed as such in some floras and databases, is illegitimate. Fosberg noted he had not found such a combination but he thus omitted the earlier work by Swartz, published in 1800.

= Hymenophyllum arbuscula Desv. View in CoL ( Desvaux 1827: 332). Type:— LA REUNION. ‘Habitat in Borbonia’, without date, without collector (lectotype P, P00477831!, here designated).

= Hymenophyllum ciliatum (Sw.) Sw. var. imbricatum Bonap. View in CoL (Bonaparte 1923: 200). Type :— GABON. ‘ Pays Itsogho. Vallée de la Waka. Entre Moubenu et Dizoma.’, October 1916, G. Le Testu 2160 (holotype P, P00483495 !; isotype P, P00483494 !).

= Hymenophyllum boryanum Willd. (Willdenow 1810: 518, 519). ≡ Hymenophyllum ciliatum (Sw.) Sw. var. boryanum (Willd.) Mett. ex Kuhn ( Kuhn 1868: 39). Type :— LA REUNION. ‘ Bourbon’, without date, J.B.G.M. Bory de St.- Vincent s.n. (lectotype B, BW 20 240010!, here designated; isolectotype P, P00477832 !).

Note: Hymenophyllum ciliatum (Sw.) Sw. var. majus Tardieu ( Tardieu-Blot 1951: 14) was previously listed as additional synonym ( Saïd et al. 2017) but our re-examination of specimens (P01315030, P00483494) seems to indicate that they rather belong to the distinct Malagasy H. poolii Baker ( Baker 1876: 415) or eventually are hybrids between H. hirsutum and H. poolii (as also suggested by F. Rakotondrainibe, comm. pers.), hence explaining that we excluded this taxon for this treatment.

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 ( Fig. 16B View FIGURE 16 ), up to 13 cm long, lanceolate to triangular, pinnate-pinnatifid to bipinnate-pinnatifid, densely hairy with light reddish-brown, stellate, pedonculated trichomes on rachises, veins and margins; numerous sori, round, paratactic, bilabiate without a developed base nor lateral veinlets and with hairy margins; receptacle short and included ( Fig. 16C View FIGURE 16 ).

Global distribution—Western Indian Ocean, tropical Africa, Neotropics.

Current distribution in Mascarenes— La Réunion, Mauritius.

Ecology—Epiphytic on tree-trunks in lowland rainforests (150–1,000 m).

Representative specimens examined— MAURITIUS. Pigeon Wood, September 2009, K. Pynee et al. s.n. ( MAU 0011517 About MAU ) ; Pétrin , February 2016, K. Pynee et al. s.n. ( MAU 0019002 About MAU ) ; Mt Cocotte , October 2010, S. Hennequin et al. 323 ( MAU 0022461 About MAU , P02432384 ) .

— LA RÉUNION. Mare Longue, April 2002, J.-Y. Dubuisson HR 2002-16 (P0243298).

Note—This species is easily distinguished from the other hairy Mascarenan Hymenophyllum species by its fully winged stipes.

K

Royal Botanic Gardens

S

Department of Botany, Swedish Museum of Natural History

Kingdom

Plantae

Phylum

Tracheophyta

Class

Polypodiopsida

Order

Hymenophyllales

Family

Hymenophyllaceae

Genus

Hymenophyllum

Loc

Hymenophyllum hirsutum

Dubuisson, Jean-Yves, Pechon, Timothée Le, Bauret, Lucie, Rouhan, Germinal, Reeb, Catherine, Boucheron-Dubuisson, Elodie, Selosse, Marc-André, Chaussidon, Cécile, Dajoz, Isabelle, Pynee, Kersley, Grangaud, Edmond, Robert, Yannis, Tamon, Jean- Maurice & Hennequin, Sabine 2018
2018
Loc

Hymenophyllum arbuscula

Desvaux, N. A. 1827: 332
1827
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