Flora of North America species comparison

leaves to 2 × 0.7 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, mostly nonseptate.

pale green;

superficial cortex of 1–2 layers of thin-walled and well differentiated cells.;

stem leaves large, ovate to oblong-ovate, ca. 2 mm, more or less spreading;

apex rounded and serrulate;

hyaline cells fibrillose and often 1–septate, convex surface generally aporose, concave surface with 1–several round pores per cell in ends and angles.

long and tapering to short and pointed, leaves loosely imbricate.

unranked to slightly 5-ranked, often short and blunt at distal end.

broadly ovate, to 2 × 1 mm or more wide, broadly ovate, hyaline cells non-ornamented, convex surface with round to elliptic pores along the commissures; chlorophyllous cells short-elliptic in transverse section and well-enclosed on both surfaces.

ovate to oblong-quadrate, 1.2–2.5 mm, not undulate or recurved when dry, strongly toothed across apex and serrulate on margins;

hyaline cells with to 4 small round ringed pores at cell ends on convex surface, small round wall thinnings in the cell ends and angles on the concave surface; chlorophyllous cells trapezoidal in transverse section, more broadly exposed on the convex surface.

dioicous.

monoicous.

with numerous pseudostomata.

22–30 µm; roughly papillose to nearly smooth, with distinct Y-mark sculpture on distal surface;

proximal laesura 0.5–0.8 spore radius.

38–48 µm;

both surfaces covered with fine to moderately coarse papillae;

proximal laesura less than 0.4 spore radius.

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

branch stems with hyaline cells non-ornamented;

no or weak funnel-like projections on the interior end walls, large round pores on superficial cell walls.

fascicles with 1–2 spreading and 0–1 pendent branches.;

branch stems green, with cortex enlarged with conspicuous retort cells.