Hypnum radicale P. Beauvois, Prodr. Aethéogam., 68. 1805; Amblystegium saxatile Schimper; Campylium radicale (P. Beauvois) Grout

Plants in soft, loose mats. Stems creeping; central strand cells small, walls thin; paraphyllia narrowly lanceolate to ovate- lanceolate; axillary hair basal cell 1, elongate, rectangular to long-rectangular, brown, distal cells elongate. Stem leaves 0.8-1.6 mm wide; alar cells few; medial laminal cells 30-60 × 5-9 µm, 4-8:1. Perichaetial leaves lanceolate. Seta elongate, 2-4.5 cm. Capsule 1.5-2 mm, constricted below mouth when dry; annulus separating, 2- or 3-seriate; operculum conic; exostome yellow-brown, external surface cross striolate basally, papillose distally, internal surface trabeculate. Spores finely roughened.

Humus, litter, mineral-rich and eutrophic wet meadows and swamps, under dense grass and sedge vegetation; low to high elevations (0-3000 m); Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que., Sask., Yukon; Ala., Calif., Colo., Conn., Del., Fla., Ga., Idaho, Ill., Ind., Kans., Ky., La., Maine, Md., Mich., Minn., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Tenn., Vt., Va., Wash., W.Va.; Mexico; Central America; Europe.

The morphology of Pseudocampylium radicale may be misleading, since the species shares with Campylium (in the broad sense) spreading to squarrose stem leaves. Specimens with non-squarrose leaves also bear much resemblance to Hygroamblystegium varium var. humile, which occurs in similar habitats. Pseudocampylium radicale may be distinguished from the latter by the decurrency of the stem leaves.