Jamesonia Hook. & Grev.
Descripción
Rhizomes short to long-creeping, with dark, bristlelike hairs; fronds linear, erect, small to medium-sized, generally indeterminate, the apices slow to fully unroll; stipes short, dark; blades 1-pinnate, the pinnae small, mostly round, imbricate, hairy or glandular, at least abaxially, herbaceous to coriaceous, margins generally inrolled; veins free, branching; sporangia along the veins, often obscured due to the dense indument and the curved pinna margins; false indusia absent or present; spores tetrahedral-globose, each with equatorial flange; x=87, prob. from x=29.
Forma de vida
TerrestreA
Distribución
México (país) Nativo y no endémicoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Jamesonia has nineteen species largely of high elevation in tropical America from Mexico to Bolivia and southeastern Brazil. It is closely allied to Eriosorus, with which it hybridizes in Central and South America (A. Tryon, 1970; Sánchez B., 2000). The Oaxaca locality is the northernmost record for the genus. Jamesonia is distinct in the linear, 1-pinnate blades that are ± permanently circinate at apices.A