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 2 × 0.7 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, mostly nonseptate.

straight to slightly curved, usually 5-ranked;

leaves not much longer at distal end than proximal end.

long and tapering to short and pointed, leaves loosely 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 2 × 1 mm or more wide, broadly ovate, hyaline cells non-ornamented, convex surface with round to elliptic pores along the commissures; chlorophyllous cells short-elliptic in transverse section and well-enclosed on both surfaces.

dioicous.

dioicous.

with numerous pseudostomata.

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

proximal laesura more than 0.5 spore radius.

22–30 µm; roughly papillose to nearly smooth, with distinct Y-mark sculpture on distal surface;

proximal laesura 0.5–0.8 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 2–3 spreading and 2–3 pendent branches.;

branch stems with hyaline cells non-ornamented;

no or weak funnel-like projections on the interior end walls, large round pores on superficial cell walls.