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 1.2 mm or more, broadly triangular to triangular-lingulate, 1.2 or more, apex acute, border broad at base (more than 0.25 width);

hyaline cells mostly efibrillose, 1–2-septate.

weakly to strongly 5-ranked.

uncrowded, 5-ranked.

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, 0.7 mm or more, straight, concave, loosely involute from apex to middle or near base;

concave surface with few (2–4) small, rounded, or elliptic pores, especially in cell angles, concave surface aporose or with 1–2 pores at cell ends.

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 1 pendent branch.