Flora of North America species comparison

leaves lingulate, 0.8–1.3 mm;

apex broadly rounded and entire to lacerate, sometimes slightly mucronate or slightly denticulate;

hyaline cells rhombic, 0–1(–2)-septate, usually efibrillose.

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 slender to short and compact, unranked to 5-ranked.

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

ovate-lanceolate, 1.1–1.3 mm, straight, concave, apex strongly involute;

margins entire, hyaline cells on convex surface with round to elliptic pores along the commissures, grading from small pores near the leaf apex to large pores near the base, concave surface with large round pores in proximal marginal regions of leaf.

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.

17–30 µm, finely papillose on proximal surface and pusticulate on distal surface;

proximal laesura less than 0.5 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 spreading and 1–2 pendent branches.

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

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