Notholaena rigida Davenp.
Descripción
Rhizomes compact, horizontal, 1.5–2.5 mm diam.; rhizome scales linear-lanceolate, ca. 3 mm long, black, concolorous, sclerotic, lustrous, margins ciliate-denticulate; fronds 30–52 cm long (12–30 cm in Chis), clumped; stipes 1⁄6–1⁄3 the frond length, castaneous to atropurpureous, terete, bases with scattered to sparse, lanceolate scales 1–1.5 mm long, these denticulate to subentire, short-glandular to white-farinose-glandular; blades narrowly elliptic, bipinnate, 4.5–7.5 cm wide; pinnae (10–)13–16 pairs, equilateral to slightly exaggerated basiscopically, the segments shallowly lobed, chartaceous; adaxial surface glabrescent medially, glandular near margins; abaxial surfaces densely whitefarinose; laminar margins not or only slightly curved; spores tan or black; 2n=60 (Tam).A
Ejemplar revisado
Chis (Breedlove 53647, CAS, ENCB). NL (Pringle 2599, NY, 15617, US). Tam (Knobloch 2244, MSC; Palmer 142, NY, UC, US; Van Devender & Burgess s.n., 20 Aug 1978, ARIZ; Yatskievych 83–109, 83–318, ARIZ).
A
A
Distribución
México (país) EndémicoA
Elevación
320 mA
Ecología y Hábitat
Limestone ledges.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species has an unusual disjunct distribution. Chiapas material differs only in being slightly smaller (12–30 cm vs. 30–52 cm long), having pinnae equilateral (vs. most slightly inequilateral), and lacking farina (but with glands).A