RHIZOMES: 2–6 mm in diameter, short- to long-creeping, few-branched, sometimes pruinose, the scales 3–5 mm long, lanceolate, acuminate at the tip, truncate to slightly rounded at the base, usually concolorous but occasionally with a faint central stripe of darker nonclathrate cells, tan to brown, the margins entire or denticulate. LEAVES: 3–25(–35) cm long. PETIOLES: longitudinally grooved adaxially, green, sometimes brown to purplish brown at the base, with sparse minute glandular trichomes. BLADES: 1.5–6.5 cm wide, oblong-triangular to narrowly ovate, with 3–16 lateral lobes, the proximal lobes appearing alternate or less commonly opposite along the midrib, the lobes 7–30 mm long, 2–12 mm wide, glabrous or with a few minute glandular trichomes along the midrib adaxially, with sparse minute glandular trichomes and inconspicuous basally attached lanceolate scales along the midrib and proximal portions of lateral veins abaxially. SPORES: 58–75 m long, the surface rugose or finely verrucose. 2n = 148. NOTES: Shaded ledges and crevices of rock outcrops of canyons, usually on igneous and volcanic substrates, but also on sandstone and rarely limestone: Cochise, Coconino, Gila, Graham, Pima, Yavapai cos. (Fig. 1B); 1500–3150 m (4920–10,350 ft); w U.S.; w Can.; nw Mex. 36 CANOTIA Vol. 5 (1) 2009 REFERENCES: Yatskievych, G. and M.D. Windham. Vascular Plants of Arizona: Polypodiaceae. CANOTIA 5 (1): 34–38, 2009.