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Pellaea
See list of 2 species in this genusReference: Windham (1993a).
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1a. Petiole, rachis, and abaxial surface of ultimate segments pubescent with short, curly hairs; leaflet stalks emerging at right angles to the rachis; ultimate segments of fertile leaves mostly 10–75 mm long; leaves hemidimorphic—the fertile leaves larger and with longer ultimate segments
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1b. Petiole and rachis glabrous or nearly so, the abaxial surface of ultimate segments glabrous except for occasional hair-like scales near the midrib; leaflet stalks ascending; ultimate segments of fertile leaves mostly 5–20 mm long; leaves essentially monomorphic
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Each photo represents one species in this genus.