Flora of North America species comparison

leaves lingulate-triangular to lingulate, 1–1.4 mm, apex broadly rounded but becoming acute in hemiisophyllous forms, border strongly developed at base (more than 0.25 width);

hyaline cells rhombic and 0–3-septate with some cells in leaf midregion 2–septate.

leaves triangular, 0.7–0.9 mm, appressed to stem;

apex apiculate;

hyaline cells efibrillose and nonseptate.

weakly to strongly 5-ranked.

moderately tapering, leaves only moderately larger at branch tips.

ovate to ovate-lanceolate, 0.9–1.2 mm, concave, subsecund on some branches, apex involute;

hyaline cells on convex surface with numerous round to elliptic pores along the commissures, grading from small round pores near apex to round pores near base, on concave surface with large round pores in proximal portions of leaf.

ovate-lanceolate, 1–1.4 mm; straight;

stiff, not undulate and slightly recurved;

margins entire;

hyaline cells efibrillose, convex surface with 1 pore per cell at cell apex, on concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells triangular in transverse section and well enclosed to just reaching concave surface.

dioicous.

unknown.

18–33 µm, coarsely papillose on both surfaces;

proximal laesura less than 0.4 spore radius.

unknown.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2 spreading and 2 pendent branches.;

branch stems green;

cortex enlarged with conspicuous retort cells.