Spores (as measured in Hoyer's Solution) 27--32 µm. 2 n = 72. Acidic rocks such as sandstone, basalt, and granite, very rarely on calcareous rocks; 0--3000 m; B.C., N.B., Nfld., N.S., Ont., Que.; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., Ga., Ill., Ind., Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Mo., Nebr., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico in Chihuahua; Europe; Asia; Africa; Australia. In southern Illinois Asplenium trichomanes subsp. trichomanes hybridizes with A . rhizophyllum to produce A . × shawneense (R. C. Moran) H. E. Ballard (R. C. Moran 1981).

From Flora of Indiana (1940) by Charles C. Deam

Infrequent to rare in pockets of soil on cliffs in the area of sandstone outcrops of the state.

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Indiana Coefficient of Conservatism: C = 10

Wetland Indicator Status: UPL

Common Name: maidenhair spleenwort Wetland Status: FAC