Bot. Not. 1865: 126. 1865
Phenology: Capsules mature early fall.
Habitat: Deciduous forests, calcareous rock, bark of trees
Elevation: moderate to high elevations
Alta., Man., N.B., Ont., Que., Ala., Ariz., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Mexico, Central America (Costa Rica, Guatemala), Asia.
Large plants of Anomodon minor with occasional noncomplanate leaves are distinguished from those of A. viticulosus by their more slender habit and smaller leaves, imbricate when dry and not secund when moist; A. viticulosus has more congested, secund branch leaves. Often A. minor has strongly spinulose basal marginal cells, like those of the auricles of A. rugelii. The lack of auricles and the thick papillae on the abaxial costa distinguish A. minor, although the presence of obvious papillae is not absolutely consistent. Characters that have been taken as of great taxonomic value for A. minor and A. rugelii may be found mixed. The only characters that remain congruent are the auricles (sometimes extremely reduced) and foliose pseudoparaphylla of A. rugelii (absent in all specimens of A. minor). Anomodon thraustus, rare in North America, has been misidentified as A. minor, but the distal costa of the latter remains pellucid for most of its length and often becomes asymmetrically 2-fid. In North America A. minor requires mesic habitats and fruits infrequently.