Stipe long, bearing ovate-lanceolate scales at the base; blade 2-pinnate to 2-pinnate-pinnatifid, narrowly triangular-lanceolate, crispaceous-herbaceous; pinnules with rounded or pointed apices, lobed or unlobed at the sides, the lower pinnules on each pinna stalked or narrowly attached.

1. Blades without glands or only sparsely glandular

2. Sori borne only on the distal portion of the blade

3. Fertile pinnae markedly narrower than the sterile pinnae, stipe scales pale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25. D. lacera

3. Fertile pinnae similar in shape to the sterile pinnae, not markedly narrowed, stipe scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30. D. uniformis

2. Sori borne on both the distal and proximal portions of the blade

4. Sori marginal or nearly so, pinnule margins not toothed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26. D. marginalis

4. Sori medial or near the midvein, pinnule margins toothed

5. Stipe scales pale to dark brown, basal pinnae pinnate-pinnatifid to 2-pinnate, ultimate segment lobes with spreading  spine-like teeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23. D. arguta

5. Stipe scales brown to very dark brown, basal pinnae 2-pinnate to 2-pinnate-pinnatifid, segments variously toothed

6. Stipe scales regularly minutely toothed or fimbriate, pinnules oblong with parallel sides, their apex rounded to truncate bearing short acute teeth. . . . . . . . . . 29. D. sublacera

6. Stipe scales not toothed nor fimbriate (some times with only a few scattered teeth), pinnules elongate-triangular or oblong with more or less parallel sides, the apex variable

7. Pinnules triangular-lanceolate, deeply lobed, the tips acute . . . . . . . . . . . . . . . . . . . . . . . . . . .28. D. stewartii

7. Pinnules elongate-ovate, hardly lobed, their tips rounded to truncate . . . . . . . . . . . . . . . .24. D. juxtaposita