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4b. Argyrochosma limitanea subsp. mexicana (Maxon) Windham, Contr. Univ. Michigan Herb. 19: 32. 1993.
Notholaena limitanea Maxon subsp. mexicana Maxon, Amer. Fern J. 9: 72. 1919; N. limitanea Maxon var. mexicana (Maxon) M. Broun
Leaf blade lanceolate to oblong, 3--4-pinnate, proximal pinnae 1/4--1/3 as long as blades. n = 2 n = 81, apogamous.
Sporulating summer--fall. Rocky slopes and cliffs; usually on calcareous or volcanic substrates; 1700--2500 m; Ariz., N.Mex., Tex.; n Mexico.
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