Flora of North America species comparison

leaves broad-triangular to triangular lingulate, 0.9–1.2 mm, apex acute to slightly rounded, border strongly broadened at base (more than 0.3 width);

hyaline cells mostly 0–1-septate, S-shaped to rhomboid.

brown, superficial cortical cells aporose.;

stem leaves lingulate, 1.1–1.2 mm, apex slightly apiculate to mostly broad and erose to lacerate, border only slightly broadened at base;

hyaline cells rhomboid and 0–1-septate.

not 5-ranked.

more or less 5-ranked.

0.9–1.2 mm, ovate-lanceolate, 0.9–1.2 mm, concave, straight, apex involute;

hyaline cells on convex surface with numerous round to elliptic pores along the commissures (4–8), grading from small pores near apex to large pores at leaf base, concave surface with large round pores in proximal portions of leaf.

0.95–1.3 mm, ovate to ovate-lanceolate, concave, straight to slightly subsecund, apex involute;

hyaline cells on convex surface with numerous surface with numerous round to elliptic pores along the commissures, grading from large pores at the base to a mixture of small and tiny (2 µm) at the apex, concave surface with a few large, round pores/cell in lower side regions.

dioicous.

unknown.

19–29 µm, finely papillose on proximal surface, more coarsely papillose on distal surface, conspicuous bifurcated Y-mark sculpture on distal surface;

proximal laesura less than 0.5 spore radius.

fascicles with 2 spreading and 2 pendent branches (rarely 1).

fascicles with 2 spreading and 1 pendent branch.