Flora of North America species comparison

leaves small, 0.3–0.7 mm, triangular-lingulate with broad rounded apex, Branches short, crowded, and unranked.

leaves 1.4–1.8 mm, elongate-triangular, lingulate-triangular, hemiisophyllous forms elongate triangular-ovate, 1.4–1.8 mm, apex usually conspicuously toothed, border narrow at base (less than 0.25 width);

hyaline cells narrowly rhombic to S-shaped, can be efibrillose and aporose but more commonly fibrillose and porose, 0–1-septate.

turgid and terete, leaves, not 5-ranked.

large, 1.4–3 mm, semi-squarrose to squarrose, ovate and abruptly involute in distal portion, appearing cucullate with toothed apex, usually no more than 6 teeth;

hyaline cells with 5 or more ringed, round to elliptical pores on convex surface, numerous pseudopores on concave surface with 3-ringed corner pores occurring in 3s at adjacent cell angles; chlorophyllous cells elliptic in transverse section, entirely included by hyaline cells, slightly nearer to convex surface.

ovate, 1.1–1.7 mm, slightly concave, straight, apex weakly involute and conspicuously toothed;

hyaline cells on the convex surface with round to elliptic pores along the commissures, grading from moderate-sized pores near apex to large pores at leaf base, concave surface with large round pores throughout.

monoicous.

uncertain, monoicous or dioicous or possibly both.

with abundant pseudostomata.

25–35 µm; finely papillose on proximal surface, coarsely papillose on distal surface with raised Y-mark sculpture;

proximal laesura short, 0.3–0.5 spore radius.

22–25 µm, finely roughened.

fascicles 4–6 branches per fascicle, 2–3 spreading and 2–3 pendent, but plants frequently unbranched in young clones.

fascicles with 2 spreading and 1–2 pendent branches.