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4b. Astrolepis sinuata subsp. mexicana D. M. Benham, Amer. Fern J. 82: 59. 1992.
Sporangia containing 64 spores; spores averaging 37--44 µm diam. 2 n = 58.
Sporulating summer--fall. Rocky slopes and cliffs; occurring on calcareous and noncalcareous substrates; 1300--1800 m; N.Mex., Tex.; Mexico; Central America.
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