Flora of North America species comparison

leaves triangular-lingulate, 1.2–1.4 mm;

apex with a deep lacerate split;

hyaline cells aporose, efibrillose and often septate.

leaves triangular to triangular-lingulate, 1–1.3 mm, apex acute to slightly obtuse, border broad at base (more than 0.25 width);

hyaline cells narrowly rhomboid, mostly 0–1-septate and mostly efibrillose.

unranked to rarely 5-ranked, branch leaves only weakly undulate, but sharply recurved at the apex, leaves not much elongated at distal end.

usually strongly 5-ranked.

ovate-lanceolate; 2–2.6 mm; straight; weakly undulate but strongly recurved, hyaline cells on convex surface with very large irregular pores (formed from the confluence of several smaller pores) at the cell apex, concave surface with large round wall thinnings in the cell angles; chlorophyllous cells triangular to trapezoidal in transverse section, apex normally slightly exposed on concave surface.

ovate to ovate-lanceolate, 1.1–1.5 mm, concave, straight, apex slightly involute;

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

dioicous.

monoicous or dioicous.

22–28 µm;

proximal surface noticeably papillose, distal surface smooth or with fewer papillae;

proximal laesura more than 0.5 the length of the radius.

19–27 µm, finely papillose on proximal surface, pusticulate on distal surface;

proximal laesura less than 0.4 spore radius.

fascicles with 2 spreading and 2 pendent branches.;

branch stem green, cortex enlarged with retort cells.

fascicles with mostly 3 spreading and 1–2 pendent branches.