Novelties in Diplazium (Woodsiaceae) with pinnate-lobulate fronds from the Neotropics

Authors

  • Alexander F. Rojas-Alvarado Universidad Nacional de Costa Rica.

DOI:

https://doi.org/10.17533/udea.acbi.14246

Keywords:

Diplazium, new records, new taxa, Pteridophyta, Woodsiaceae

Abstract

Two new species of Diplazium with pinnately-lobed fronds are described here: D. pseudocarnosum and D. salazarianum. The first species can be distinguished from Diplazium carnosum by shorter rhizome scales, shorter fronds, relatively fewer pinnae pairs and these pinnae lanceolate-oblong and 3-4 times longer than wide, usually with an axillary bud in the last couple of pinnae and the indusium with erose margin. The second species differs from Diplazium urticifolium by pinnae lobed and incised margin with 1/4-2/5 between the margin and the costa and axillary buds 5-10 per frond. Additionally, it describes D. urticifolium var. mesoamericanum which features a pinnatifid apex without subterminal buds. Finally, Diplazium costale var. robustum is transfereded to D. robustum and it distribution is expanded, and the distribution of Diplazium moccennianum is extended.

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Author Biography

Alexander F. Rojas-Alvarado, Universidad Nacional de Costa Rica.

School of Biological Sciences. National University of Costa Rica. P.O. Box 86-3000. Heredia, Costa Rica.

References

Adams CD. 1995. Diplazium. En: Moran RC y Riba R, editores. Flora Mesoamericana. Volumen 1. Psilotaceae a Salviniaceae. México D. F. (México): Universidad Nacional Autónoma de México. Ciudad Universitaria. p. 228-246.

Mickel JT, Smith AR. 2004. The Pteridophytes of Mexico. Memoirs of the New York Botanical Garden, 88: 251-268.

Moran RC. 2009. Géneros neotropicales de helechos y licófitos. Una guía para estudiantes. Sistemática de plantas tropicales. Mimeografiado. p. 406.

Schuettpelz E, Pryer KM. 2007. Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. Taxon, 56 (4): 1037-1050.

Tryon RM, Stolze RG. 1991. Pteridophyta of Peru. Part IV. 17. Dryopteridaceae. Fieldiana Botany, new series, 27: 65-88.

Published

2017-10-18

How to Cite

Rojas-Alvarado, A. F. (2017). Novelties in <i>Diplazium</i> (Woodsiaceae) with pinnate-lobulate fronds from the Neotropics. Actualidades Biológicas, 34(97), 153–159. https://doi.org/10.17533/udea.acbi.14246

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