Under water in stream. Gemmae green ovoid. Rounded leaf lobes. Dorsal lobe not decurrent. Keel straight.
On wet gravel road side. 2nd photo showing involucre and antheridial cavity, one large chloroplast per cell.
In wet sand/gravel with nostoc balls, stellate gemmae
On floating log. Erect gemmae shoots. Leaf bordered with single row of cells. Bulging trigones
On path into bog/swamp area. Upper leaves crowded, crispste. Leaves longer than wide. Lower leaves two lobed. Upper leaves with more teeth Leaf cells large, with thin walls and concave trigones.
Growing with Pellia on soil at edge of bog mat. Underleaves bilobed with a shallow sinus
24-138. On soil next to trail. Green protonemata over soil. Capsules with leaves at base of setae. Leaves lanceolate from ovate sheathing base, 3-4-mm, lamellae on upper portion of leaf, teeth at apex.
24-212. On rock near Hudson River. Leaves ovate lanceolate, 2 mm, border tightly recurved, costa percurrent to short excurrent, apex acute with a few teeth, decurrent. Upper leaf cells firm-walled, 2-3x as long as wide. Basal cells rectangular.
24-154. On concrete wall. Stems prostrate, creeping with crowded, erect, pinnate branches. Stem leaves deltoid, 1 mm, sharply contracted to a long piliferous acumina. Margins long ciliate. Costa 1/2 -3/4 length. Cells unipapillose dorsally with simple papillae.
24-155. Mat on cement wall. Capsules arcuate, inclined to horizontal, red setae. Leaves ovate-lanceolate, 1 mm, long acuminate. Costa flexuose, subpercurrent. Alar cells quadrate.
24-179. On tree trunk. Stems prostrate, creeping with crowded, erect, pinnate branches (1-2). Stem leaves deltoid with wide base, 1 mm, sharply contracted to a long piliferous acumina (3-4). Margins long ciliate. Costa 1/2 -3/4 length. Cells unipapillose dorsally with simple papillae (5). Capsules cylindrical, brown with white teeth (6-7). Dwarf males present (8-9).