Monographs Details: Phyllitis
Authority: Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Description:Genus Description - Epipetric or terrestrial; rhizome ascending, compact, with dark, clathrate scales; fronds clumped, erect to spreading; stipe very short, scaly; blade simple, linear-lanceolate, strap-shaped, base cordate or subcordate, margin entire, undulate or plane, texture subcoriaceous to herbacous; veins free, forking, parallel; sori linear, paired, facing each other (from adjacent veins), indusiate; spores bilateral, with cristate perispore.
Discussion:Type: Phyllitis scolopendrium (Linnaeus) Newman [=Asplenium scolopendrium Linnaeus]. (See Pichi Sermolli, Webbia 9: 431-433. 1953, for another opinion.)
Scolopendrium Adanson, Fam. pl. 2: 20. 1763. Type: Scolopendrium vulgare J. E. Smith [=Asplenium scolopendrium Linnaeus].
Phyllitis is a genus of three (to five) species, largely of temperate regions, in Europe (common), Asia, North America (rare), and the neotropics (rare in southern Mexico & Hispaniola). The species are difficult to distinguish. The genus is only marginally distinct from Asplenium, and there are several intergeneric hybrids. Phyllitis is distinguished by its simple elongate blade and paired (facing) sori.
Reference: Love, A., & D. Love. 1973. Cytotaxonomy of the boreal taxa of Phyllitis. Acta Bot. Acad. Sci. Hung. 19: 201-206.