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-lingulate to ovate-lingulate, 0.8–0.9 mm, apex rounded, straight;

hyaline cells mostly non-septate, fibrillose in distal 1/3–2/3 of leaf, a few ringed pores at corners of cells and along commissures on convex surface, ringed pores along the commissures on the concave surface in greater numbers than on convex surface.

weakly to strongly 5-ranked.

short, not turgid.

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.

broad-ovate to ovate-lanceolate, 0.9–2.1 mm, straight;

hyaline cells with numerous ringed pores (10–20) along the commissures on the convex surface, a few pseudopores and ringed pores (less than 8 per cell) occur on the cell angles on the concave surface.

dioicous.

dioicous.

exserted, with few pseudostomata.

18–33 µm, coarsely papillose on both surfaces;

proximal laesura less than 0.4 spore radius.

36–39 µm; coarsely papillose on both surfaces;

proximal laesura less than or equal to 0.5 spore radius.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2–3 spreading and 1–2 pendent branches.