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 lingulate-triangular to triangular-lingulate, equal to or less than 1.2 mm, more or less spreading;

apex obtuse;

hyaline cells mostly fibrillose and nonseptate.

straight to slightly curved, usually 5-ranked;

leaves not much longer at distal end than proximal end.

straight to distinctly curved, leaves becoming substantially longer at distal end of the branch.

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.

ovate-lanceolate, 1.5–2 mm, straight to slightly subsecund, only slightly undulate and recurved if at all;

margin entire;

hyaline cells on convex surface with numerous small free pores, on concave surface with numerous round free pores, cells relatively short in basal region (similar to mid region); chlorophyllous cells ± triangular in transverse section, just reaching concave surface or slightly enclosed.

dioicous.

dioicous.

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

proximal laesura more than 0.5 spore radius.

25–32 µm, finely papillose on both surfaces.

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 green, with cortex enlarged with conspicuous retort cells.