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 elongate-triangular, 1.3–1.5 mm; often spreading;

apex obtuse;

hyaline cells mostly efibrillose and 1–septate in proximal half and lateral portions of leaves.

weakly to strongly 5-ranked.

unranked, often blunt and with leaves moderately 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 to broadly ovate at branch base and becoming ovate-lanceolate at branch tip; 1.2–1.5 mm; undulate when dry, margins serrulate;

hyaline cells of convex surface with 0–5 pores or pseudopores at cell apex, concave surface with faint round wall thinnings in cell angles, but may be absent, chlorophyllous cells trapezoidal in transverse section, exposed more broadly on convex surface.

dioicous.

probably dioicous.

18–33 µm, coarsely papillose on both surfaces;

proximal laesura less than 0.4 spore radius.

not seen.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2–3 spreading and 0–2 pendent branches.;

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