A new species of Elaphoglossum Schott ex J. Sm. (Dryopteridaceae) from Costa Rica
Fecha
2017-12
Autores
Rojas Alvarado, Alexander
Muñoz-Cambronero, Pablo Elías
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Editor
Universidad Nacional (Costa Rica)
Resumen
Una especie nueva de Elaphoglossum Schott ex J.Sm. Dryopteridaceae) para Costa Rica.Una especie nueva de ElaphoglossumSchott ex J. Smde la sección UndulataChrist es descrita aquí: Elaphoglossum pallidosquamum A. Rojas & P. Muñoz. La nueva especie es similar a E. herpestes por su rizoma largo ascendente, pero difiere por escamas del rizoma no cordadas basalmente (vs. cordadas) y más pálidas pardo-amarillentas con margen blanquecino o completamente blanquecinas (vs. castañas), escamas del estípite adpresas (vs. adpresas a moderadamente patentes) y más densas, lámina más angosta 2.5-4 cm de ancho (vs. 5-6.5 cm) con base anchamente cuneada a obtusa (vs. redonda), lámina con diferentes tipos de escamas las costales imbricadas (vs. distantes entre sí), escamas adaxiales densas (vs. dispersas), escamas abaxiales enrrolladas y moderadamente densas (vs. escamas abaxiales planas y dispersas) y, escamas marginales muy densas (vs. moderadamente densas a dispersas) y estas más pálidas blanquecinas a amarillo pálido (vs. pardas).
A new species of ElaphoglossumSchott ex J. Sm of section Undulata Christ is described here: Elaphoglossum pallidosquamum A. Rojas & P. Muñoz. The new species is similar to E. herpestes because of its long ascending rhizome, but differs by its not chordate (vs. chordate) basally and paler rhizome scales brown-yellowish with whitish margin or fully whitish (vs. castaneous), appressed (vs. appressed to moderately patent) and more dense stipe scales, narrower blade 2.5-4 cm broad (vs. 5-6.5 cm) with broadly cuneate to obtuse base (vs. rounded), blade with different scale types costa with imbricate scales, dense and flat adaxial scales, moderately dense and enrolled abaxial scales and very dense marginal scales (vs. all scales similar except for denser in midvein) and they are paler whitish to pale yellow (vs. brown).
A new species of ElaphoglossumSchott ex J. Sm of section Undulata Christ is described here: Elaphoglossum pallidosquamum A. Rojas & P. Muñoz. The new species is similar to E. herpestes because of its long ascending rhizome, but differs by its not chordate (vs. chordate) basally and paler rhizome scales brown-yellowish with whitish margin or fully whitish (vs. castaneous), appressed (vs. appressed to moderately patent) and more dense stipe scales, narrower blade 2.5-4 cm broad (vs. 5-6.5 cm) with broadly cuneate to obtuse base (vs. rounded), blade with different scale types costa with imbricate scales, dense and flat adaxial scales, moderately dense and enrolled abaxial scales and very dense marginal scales (vs. all scales similar except for denser in midvein) and they are paler whitish to pale yellow (vs. brown).
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Palabras clave
EUPOLIPODIOS, HELECHOS, POLYPODIALES, PTERIDOPHYTA, SECCIÓN UNDULATA, EUPOLYPODS, FERNS