Lomaria spannagelii (Rosenst.) Gasper & V.A.O.Dittrich, 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 : 211-212

6. Lomaria spannagelii (Rosenst.) Gasper & V.A.O.Dittrich , comb. nov. — Blechnum spannagelii Rosenst., Hedwigia 46: 93–94. 1907.

Lomaridium C.Presl, Abh. Königl. Böhm. Ges. Wiss. , ser. 5, 6: 514. 1851. — Type: Lomaridium plumieri (Desv.) C.Presl, Abh. Königl. Böhm. Ges. Wiss. , ser. 5, 6: 514–515. 1851. Figs. 4C , 6I .

Plants terrestrial or climbing by rhizomes; rhizomes long-creeping,climbing trees or ascending to erect,non-stoloniferous, stout, clothed with mostly bicolorous, long-lanceolate, denticulate or entire (rare) scales; fronds dimorphic; stipes stout, long, stramineous, brown to dark brown, proximally with scales like those of rhizomes, glabrous or minutely but densely papillose; blades concolorous or bicolorous, the adaxial side dark green, abaxially silver-green, lanceolate or ovate-deltate, deeply pinnatisect or pinnate in the proximal half, usually with many pairs of greatly reduced, auriculate or vestigial pinnae proximally, distally pinnatifid, sometimes with an entire, acuminate blade tip; rachises glabrous or with scattered minute hairs, often atropurpureus; buds absent; aerophores absent; pinnae adnate, oblong-acute to linear-attenuate or narrowly triangular, sometimes falcate, margins entire, slightly revolute; veins free, 1-furcate proximally, terminating near margins in enlarged vein tips adaxially; sori linear, indusia linear, entire to subentire; x = 29, 32.

Species number, comments, and distribution:— 16 species in southern tropical regions, especially the Neotropics, eastern Africa, and Madagascar; a single species, Lomaridium contiguum , is known from Australasia. Lomaridium is easily distinguished from other Blechnaceae by the denticulate rhizome scales, glabrous leaves, and plants that climb by rhizomes.

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 6. Habitat of Blechnaceae genera. A. Blechnum occidentale; B. Brainea insignis; C. Cleistoblechnum eburneum. D. Cranfillia vulcanica; E. Diploblechnum fraserii; F. Doodia caudata; G. Icarus filiformis; H. Lomaria spannagelii; I. Lomaridium acutum. Photos from: A. Luis Adriano Funez; B. Ralf Knapp; C. Ralf Knap; D. Julie F. Barcelona; E. Michael Sundue; F. Paulo Araújo; G. WELT herbarium; H. Vinícius A.O. Dittrich; I. Tiago João Cadorin. Reproduced with permission from the authors.