Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Polypodiaceae
Species Description - Rhizomes short-creeping, not pruinose, 5–8 mm diam.; rhizome scales dense, brown, deltate-lanceolate, 4–8 x 1.5–2(–3) mm, subclathrate, the cells elongate, at least twice as long as wide; fronds (30–)50–120 cm long, clumped (2–5 mm apart); stipes absent or extremely short (to narrowly winged to 15 cm), often not clearly demarcated; blades rigidly chartaceous to subcoriaceous, often lustrous, oblanceolate, 5–8(–12) cm wide, gradually tapering nearly to rhizomes at bases, apices acute to acuminate; lime dots absent adaxially; areoles (6–)8–16 rows between midribs and margins, excurrent veinlets 3 or 4 per primary areole, a middle one usually completely bisecting the areole; main lateral veins prominent, secondary veins regularly anastomosing; sori 6–15-seriate between the midribs and blade margins, in two very regular rows between main lateral veins, 2 sori per primary areole; 2n=74 (Fla, Jam, Galapagos), 148 (Jam).
Polypodium phyllitidis L., Sp. Pl. 2: 1083. 1753. Lectotype (chosen by Proctor, 1977: 341). Plumier, Descr. Pl. Ame´r., pl. 38, 1693, representing a plant from “Antilles.”
Specimens determined as Camplyoneurum latum T. Moore or C. brevifolium (Lodd. ex Link) Link in various herbaria (e.g., Mickel 5846, NY, UC) are referable here. Both Lellinger (1989) and Leo´n (1992, and in Davidse et al., 1995) considered C. phyllitidis and C. latum [= C. brevifolium] to occur in Mexico. The distinctness of C. brevifolium from C. phyllitidis remains in doubt, and even if the two are not the same elsewhere in the range, Mexican specimens so identified as C. latum are not distinguishable from C. phyllitidis. Leo´n (1992) cited one of the specimens listed above (Alcocer R. 11111 from Jalisco) as C. brevifolium; we have also seen the three Mickel collections she cited as C. brevifolium from Oaxaca, and all are inseparable from C. phyllitidis, in our opinion. The venation in Mexican material of this species is variable, with the primary areoles being often subdivided, not only by excurrent veinlets but also by some recurrent and/or forking veinlets. The fronds are broad and the margins undulate to a greater degree than in other parts of the range of this species.