Flora of North America species comparison

leaves generally larger than branch leaves, 1.3– 1.8 × 0.8–1 mm;

elliptic to lingulate-spatulate, widest above middle, hyaline cells 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-cylindrical, branch leaves terete to sometimes distinctly squarrose in shade forms.

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

1–1.4 mm, ovate to ovate-lanceolate, gradually narrowed to an involute tip, hyaline cells somewhat bulging on concave surface and nearly plane on convex surface, with 4–8 large, elliptic, unringed pores per cell on convex surface and 1–4 irregularly rounded pores per cell on concave surface, internal commissural walls smooth to rather strongly papillose, chlorophyllous cells ovate-triangular with the widest part at or close to the convex surface.

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.

21–26 µm;

proximal and distal surfaces smooth, papillae indistinct;

proximal laesura 0.5–0.6 spore radius.

38–48 µm;

both surfaces covered with fine to moderately coarse papillae;

proximal laesura less than 0.4 spore radius.

fascicles typically with 3 spreading (sometimes 2) and 2 pendent branches.;

branch stems with single layer of cortical cells.

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

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