Flora of North America species comparison

leaves broadly ovate, 3.5–4 mm, apex rounded and indistinctly toothed;

hyaline cells on convex surface with 10–20 small (2.5–7.5 µm) round pores approximately 1/6 the diameter of the hyaline cells along the commissures, cells on concave surface uniporose in distal end or aporose, sometimes one or a few pores are scattered over the surface of the cells.

leaves to 1.3–1.9 × 0.6–1.2 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, nonseptate or sometimes septate.

few, single and short or more commonly none.

± tapering, leaves loosely imbricate to spreading and often squarrose in shade forms.

if any, are usually slightly smaller, 2–3 mm, but otherwise identical to the stem leaves.

ovate to ovate elliptical, 1.5–2 × 0.9–1.6 mm;

hyaline cells on convex surface with elliptic to more often round pores along the commissures, comb-lamellae can be present, but often absent or restricted to leaf bases; chlorophyllous cells broadly triangular in transverse section and well-enclosed on the convex surface;

end wall not thickened.

dioicous.

dioicous.

immersed in perichaetial leaves, pseudopodium extremely short, without pseudostomata.

with scattered pseudostomata.

25–40 µm; coarsely papillose on both surfaces;

proximal laesura more than 0.5 the length of the spore

27–31 µm; granulate on both surfaces;

laesura on proximal surface less than 0.5 the spore radius.

fascicles, if any, usually only 1 single branch.

fascicles with 2 spreading and 2–3 pendent branches.;

branch stems with cortical cell comb-lamellae weakly differentiated on interior wall, no or weak funnel-like projections on the interior end walls, pores in superficial wall mostly restricted to leaf attachments.