Flora of North America species comparison

leaves triangular to lingulate-triangular, 0.8–1.3 mm; typically appressed;

apex acute to apiculate;

hyaline cells efibrillose and nonseptate to rarely septate.

leaves narrowly triangular-lingulate, 1.5–2 mm, apex right-angled to apiculate, border moderately strong and greatly broadened at the base (more than 0.25 width);

hyaline cells rhombic, 0–1-septate, normally fibrillose near apex.

straight and somewhat tapered, usually 5-ranked;

leaves little elongate at the distal branch end.

not 5-ranked, terete, long and tapering.

ovate to narrowly ovate-lanceolate; (1.1–)1.4–1.8(–3.1) mm; slightly undulate and sharply recurved when dry, somewhat subsecund;

margins entire;

hyaline cells on convex surface with usually 1 round pore on apical end, on concave surface with wall thinnings in the cell ends and angles; chlorophyllous cells broadly triangular in transverse section and very deeply enclosed on the concave surface.

ovate-lanceolate, 1.5–2.3 mm, straight, concave, apex strongly involute;

margins entire;

hyaline cells on convex surface with elliptic pores along the commissures, grading from moderate-sized pores near leaf apex to large pores at leaf base, concave surface with large round pores in proximal marginal regions of leaf.

dioicous.

dioicous.

19–25 µm; finely papillose on both surfaces.

27–32 µm, finely papillose on both surfaces;

proximal laesura less than 0.5 spore radius.

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

branch stems green but often reddish at proximal end, with cortex enlarged with conspicuous retort cells.

fascicles with 2 spreading and 1–2 pendent branches.