Flora of North America species comparison

leaves to 1.3 × 0.7 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, mostly septate.

leaves triangular to triangular-lingulate, 1.2–1.7 mm, apex acute to sometimes shortly cuspidate due to involute margins near apex, border narrow at base (less than 0.25 width);

hyaline cells mostly efibrillose and aporose, 0–1(–2)-septate.

generally short and blunt, leaves spreading.

long and tapering, unranked.

broadly ovate, 1.7 × 1 mm;

hyaline cells on convex surface with round to elliptic pores along the commissures, hyaline cell walls covered with papillae where overlying chlorophyllous cells; chlorophyllous cells trapezoidal to truncate-elliptic in transverse section, equally exposed on both surfaces or less exposed on convex surface, end walls thickened.

1.3–2.7 mm, ovate to ovate-lanceolate, 1.3–2.7 mm, concave, straight, apex involute;

hyaline cells on convex surface with 2–6 large, narrowly elliptic ringed pores along the commissures, but usually absent from marginal regions of leaf, concave surface aporose or with 1–4 large round pores per cell especially near base.

dioicous.

monoicous.

with numerous pseudostomata.

26–36 µm; more roughly papillose on distal surface than proximal surface, distinct raised, bifurcated-Y mark sculpture on distal surface;

proximal laesura 0.5 spore radius or more.

22–32 µm, finely to irregularly coarsely-papillose on proximal surface, irregularly coarsely papillose on distal surface;

proximal laesura less than 0.5 spore radius.

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

branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the interior end walls, mostly with 1 pore per cell on superficial cell wall.

fascicles with 2 spreading and 1–2 pendent branches.