Flora of North America species comparison

leaves to 1.2 × 0.8 mm; rarely hemiisophyllous;

hyaline cells mostly nonseptate, comb-lamellae usually absent, but sometimes weak.

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

hyaline cells non-ornamented, nonseptate or sometimes septate.

short and blunt-tipped, leaves spreading.

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

ovate to ovate-elliptical, 1.6–2.2 × 1 mm;

hyaline cells on proximal half of convex surface with round to elliptic pores along the commissures;

comb-lamellae on hyaline cell wall where overlying chlorophyllous cells; chlorophyllous cells broadly triangular in transverse section and well-enclosed on convex surface, end wall not thickened.

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.

unknown.

with scattered pseudostomata.

unknown.

27–31 µm; granulate on both surfaces;

laesura on proximal surface less than 0.5 the spore radius.

fascicles with 2 spreading and 1 pendent branch.;

branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the end walls of cortical cells, cortical cell walls usually with large round pores.

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.