Lomariocycas yungensis (J.P.Ramos) Gasper & A.R.Sm., 2016

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 : 213-214

19. Lomariocycas yungensis (J.P.Ramos) Gasper & A.R.Sm. , comb. nov. — Blechnum yungense J.P.Ramos, Novon 20: 68. 2010.

Neoblechnum Gasper& V.A.O.Dittrich , gen.nov. — Type: Neoblechnum brasiliense (Desv.) Gasper &V.A.O.Dittrich. Figs. 4E , 7B .

Diagnosis: Rhizomes stout, erect, forming caudices, apices covered by long (2 cm) black, glossy, acicular, curved, entire scales; fronds monomorphic; pinnae adnate, strongly decurrent at bases, margins serrulate; proximal pinnae (many pairs) gradually reduced to small triangular, obtuse lobes ca. 1 cm long, broader than long.

Plants terrestrial; rhizomes erect, stout, trunk-like, non-stoloniferous, clothed with black, glossy, acicular, curved, entire scales; fronds monomorphic; stipes stout, short, brown to blackish, proximally with smaller scales similar to those of the rhizomes, glabrous or glabrescent distally; blades concolorous, oblong-lanceolate, pinnate to pinnatisect, gradually reduced at base, with small auricles at the blade bases, apices pinnatifid; rachises glabrous or with tiny capitate hairs; buds absent; aerophores absent; pinnae adnate to rachises, decurrent, linear to linear-lanceolate, margins serrulate; veins free, 1-furcate, each ending at pinna margins; sori linear, indusia entire to subentire; x = 66.

Species number, comments, and distribution:— One neotropical species. The plants are monomorphic, with trunk-like rhizomes when old; pinna margins are serrulate. The name was coined from the exclusively neotropical occurrence of the sole species Neoblechnum brasiliense . It is closely related to Oceaniopteris and Doodia (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.