STEMS: monomorphic, prostrate to loosely ascending, occasionally pendant, not readily fragmenting when dry, the branch tips appearing straight when dry, forming usually loose mats. RHIZOPHORES: produced throughout. LEAVES: monomorphic, 2.0–3.5 mm long, linear to narrowly triangular-lanceolate, green to dark green when hydrated, the base more or less decurrent (similar in color to the stem) and more or less symmetrically narrowed, the tip with a straight or somewhat curved yellowish green seta 0.2–0.8(–1.2) mm long 44 CANOTIA Vol. 5 (1) 2009(sometimes breaking off with age), the margins short-ciliate, sometimes grading to denticulate distally. STROBILI: 5–30 mm long, the sporophylls lanceolate to broadly lanceolate with a strongly auriculate base, narrowed to an acute tip with a short seta, the margins denticulate, sometimes grading to short-ciliate proximally. MEGASPORES: finely rugose-reticulate, orange. NOTES: Rock outcrops, ledges, boulders, and cliffs, on various substrates: Cochise, Coconino, Gila, Graham, Pima, Santa Cruz, Yavapai cos. (Fig. 1G); 1500–2450 m (5000–8000 ft); UT and s CO s to AZ and TX; n Mex. REFERENCES: Yatskievych, G. and M. D. Windham. Vascular Plants of Arizona: Selaginellaceae. CANOTIA 5 (1): 39–48, 2009.