Flora of North America species comparison

leaves lingulate-triangular to lingulate, 1–1.4 mm, apex broadly rounded but becoming acute in hemiisophyllous forms, border strongly developed at base (more than 0.25 width);

hyaline cells rhombic and 0–3-septate with some cells in leaf midregion 2–septate.

leaves broadly oblong-triangular, 1.2–1.5 mm; mostly appressed to stem;

apex obtuse;

hyaline cells narrow, usually nonseptate, efibrillose and aporose on convex surface near apex, on concave surface usually efibrillose with irregular pores along commissures in distal portion of leaf.

weakly to strongly 5-ranked.

with loosely imbricate leaves; often 5-ranked;

leaves little to somewhat elongated at distal end.

ovate to ovate-lanceolate, 0.9–1.2 mm, concave, subsecund on some branches, apex involute;

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

ovate, ovate-lanceolate to lanceolate; 2–3.5 mm;

flat and undulate at margins and recurved at apex when dry; straight;

margins entire;

hyaline cells on concave surface with very numerous, small ringed or unringed pores along the commissures, 5–12 in distal portion of leaf and 20–27 in proximal portion, convex surface with 5–15 pores per cell in distal portion of leaf and 14–21 in proximal portion, pores usually without a ring; chlorophyllous cells triangular to trapezoidal in transverse section and exposed slightly on concave surface.

dioicous.

dioicous.

18–33 µm, coarsely papillose on both surfaces;

proximal laesura less than 0.4 spore radius.

ca. 30 µm;

very slightly roughened.

fascicles with 2 spreading and 1–2 pendent branches.

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

branch stems green, with cortical cells in 1 layer with conspicuous necks.