Revision of monotypic genus <em>Llavea</em> (Cryptogrammoideae: Pteridaceae)

Mónica Palacios-Rios; Marcelo D. Arana; Gonzalo Márquez

doi:10.3989/ajbm.2417

Authors

Mónica Palacios-Rios Instituto de Ecología, A.C., Red de Biodiversidad y Sistemática - Instituto de Biotecnología y Ecología Aplicada, Universidad Veracruzana
Marcelo D. Arana Orientación Plantas Vasculares, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto
Gonzalo Márquez Cátedra de Palinología, Facultad de Ciencias Naturales y Museo, UNLP

DOI:

https://doi.org/10.3989/ajbm.2417

Keywords:

Allosorus karwinskii, Ceratodactylis osmundioides, Cryptogrammoideae, Ferns, Llavea cordifolia, Palynology, Pteridaceae, SEM, spores, Taxonomy

Abstract

Llavea Lag. is a genus of Cryptogrammoideae (Pteridaceae), whose only species is distributed from southern United States and Mexico to Guatemala and Costa Rica, although it lives mainly in Mesoamerica, inhabiting preferably calcicolous habitats associated with forests and mountains. The genus is easily recognized by the presence of fertile leaves hemi-dimorphic, with the fertile apical portion with longer and narrower segments than the sterile ones, with strongly revolute margin, and rhizome scales bicolorous, shiny, and black. This paper presents a revision of the genus, nomenclatural issues are resolved, and and palynological morphological diversity are reviewed, as well as its distribution, phenology, ecology, and applications, based on field and herbarium specimens studies. In addition, two names related to Llavea, Allosorus karwinskii Kunze and Ceratodactylis osmundioides J. Sm., were lectotypified.

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