A new Elaphoglossum from Brazil 



by 



Carl Christensen. 



In the pretty collection of Brazilian ferns from Dr. Glaziou 

 (Herb, Warming, now in the Botanical Museum of Copenhagen) I 

 have found a little Elaphoglossum,, apparently new to science. It 

 belongs to Condyloneura subsectio Setosa of Christ, the mono- 

 grapher of this genus, and stands near to small forms of E. villosum. 

 It is, however, a new and very peculiar species, remarkable by its 

 sterile leaves being proliferous. Only one proliferous species of 

 Elaphoglossum (E. undulatum (Willd.) Moore) is hitherto known ; 

 it bears a squamose bud at the apex of the midrib but produces 

 rarely or never small plants. The new species, here described, 

 bears a similar squamose bud on the costa at the emarginated 

 apex of the sterile frond, and this bud very often produces one 

 or two small leaves. Otherwise the little plant is remarkable by 

 its very thin texture. Held to the eye the parenchyma of the leaf 

 is transparent, and with the aid of a lense the cells are clearly 

 visible, nearly as in a species of Trichomanes § Didymoglossum. 

 Thence I name the species: 



Elaphoglossum didymoglossoides n. sp. 



Planta pusilla, cæspitosa, rhizomate erecto, squamoso, foliis 

 dimorphis: sterilibus oblongis, translucentibus apicibus proliferis, 

 fertilibus minimis suborbicularibus. 



Rhizoma parvum, erectum, squamis rufis, lineari-subulatis, sub- 

 dentatis, l mm longis dense vestitum. Folia sterilia cum petiolis 

 2 — 4 cm longa, longe petiolata. Petiolus gracilis, ad 2 Qm longus, 

 squamis rufo-brunneis, linearibus, patentibus dense instructus, denique 

 denudatus. Lamina ovato-oblonga, 1 — 2V2 cm longa, 5 — 8 mm lata, 

 membranacea, tenuissima, translucens, ad basin breviter cuneata, 



