Sadleria wagneriana D.D.Palmer & Flynn

Gasper, André Luís De, Dittrich, Viníciusantonio De Oliveira, Smith, Alan R. & Salino, Alexandre, 2016, A classification for Blechnaceae (Polypodiales: Polypodiopsida): New genera, resurrected names, and combinations, Phytotaxa 275 (3), pp. 191-227 : 221

6. Sadleria wagneriana D.D.Palmer & Flynn , Pacific Sci. 51: 302. 1997.

Struthiopteris Scop., Meth. Pl. 25. 1754. —Spicanta C.Presl 114. 1851, nom. superfl.— Type: Struthiopteris spicant (L.) F.W.Weiss., Pl. Crypt. Fl. Gott. 287. 1770. Figs. 4I , 7F .

Homophyllum Merino, Ann. Soc. Hist. Nat. 1898: 108 . — Type: Homophyllum blechniforme Merino [= Blechnum spicant (L.) Roth] = Struthiopteris spicant (L.) F.W. Weiss.

Spicantopsis Nakai, Bot. Mag. (Tokyo) 47: 180. 1933. — Type: Spicantopsis niponica (Kunze) Nakai , based on Lomaria niponica Kunze [= Blechnum niponicum (Kunze) Makino ]

Plants terrestrial; rhizomes short-creeping or elongate, non-stoloniferous, stout, clothed with brown to dark brown, linear, lanceolate, or ovate-lanceolate, entire or sparingly toothed scales; fronds dimorphic or subdimorphic ( S. amabilis ); stipes slender, short, stramineous or dark purplish, scaly proximally, glabrous distally; blades concolorous, oblanceolate or lanceolate, pinnate to pinnatifid, very gradually reduced proximally to auricles, apices pinnatifid; rachises with a few filiform scales or glabrous; buds absent; aerophores absent; pinnae adnate, oblong-linear to linear-falcate, margins entire; veins free, inconspicuous, furcate, ending in submarginal hydathodes adaxially; sori linear, on both sides of costae, indusia linear, continuous or not, entire, usually enveloping sporangia at maturity; x = 31, 34.

Species number, comments, and distribution:— Five temperate species, mostly from China and Japan, with Struthiopteris spicant having a circumboreal distribution. Characterized by the subdimorphic to dimorphic fronds, adnate pinnae, free veins, and veins ending in submarginal hydathodes. Struthiopteris resembles Austroblechnum , but they can be distinguished by the distribution, north-temperate for Struthiopteris and predominantly austral for Austroblechnum . Pinna margins — entire in Struthiopteris and crenate to serrate in Austroblechnum — also differ. Struthiopteris is closely related to Blechnidium and Brainea (Gasper et al. in press).

Figures

FIGURE 4. General appearance of the genera of Blechnaceae subfamily Blechnoideae (G-S). A. Icarus filiformis (WELT P009478); B. Lomaria nuda (P01557820); C. Lomaridium fragile (MEXU 149093); D. Lomariocycas aurata (QCA7004842); E. Neoblechnum brasiliense (FURB06585); F. Oceaniopteris cartilaginea (P01630912). G. Parablechnum cordatum (FURB06639); H. Sadleria pallida (MEXU 956078); I. Struthiopteris spicant (P01658104). Vouchers are indicated by herbarium barcodes.

FIGURE 7. Habitat of Blechnaceae genera. A. Lomariocycas schomburkii. B. Neoblechnum brasiliense; C. Oceaniopteris gibba; D. Parablechnum glaziovii; E. Sadleria cyatheoides; F. Struthiopteris spicant; F. Photos from:A–B. Luis Adriano Funez; C. Vojtěch Zavadil; D. Vinícius A.O. Dittrich; E. Kit Herring; F. Ralf Knapp. Reproduced with permission from the authors.