Flora of North America species comparison

leaves equilateral to isosceles-triangular, small, less than 0.8 mm, mostly appressed to stem, apex acute to obtuse, hyaline cells efibrillose and nonseptate.

leaves to 1.2–2.2 × 0.8–1 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, rarely septate, comb-lamellae absent.

straight to slightly curved, usually 5-ranked;

leaves not much longer at distal end than proximal end.

tapering, leaves spreading to somewhat imbricate.

narrowly ovate-lanceolate, 0.8–1 mm, straight, moderately undulate and recurved in larger and/or wetter grown forms, not undulate and slightly recurved in compact forms from drier sites;

margins entire;

hyaline cells on convex surface with 1(2–3) pore per cell at apical end of cell, on concave surface with round wall thinnings in cell ends and angles; chlorophyllous cells triangular in transverse section and just enclosed on concave surface.

broadly ovate, to 1.7 × 1.5 mm;

hyaline cells non-ornamented, convex surface with elliptic to rarely round pores along the commissures; chlorophyllous cells lenticular to narrowly elliptical in transverse section, narrowly exposed on both ends, but more so on concave surface, end walls thickened at both ends.

dioicous.

dioicous.

with inconspicuous pseudostomata.

21–25 µm; coarsely papillose on proximal and distal surfaces;

proximal laesura more than 0.5 spore radius.

23–30 µm;

surface finely roughened to smooth;

laesura on proximal surface more than 0.5 spore radius.

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

branch stems with cortex enlarged with conspicuous retort cells, often pinkish red at proximal end.

fascicles with 2 spreading and 1–2 pendent branches.;

branch stems with cortical cells non-ornamented, no or weak funnel-like projections on the interior end walls, often with large round pores on the superficial walls.