Flora of North America species comparison

leaves triangular-lingulate to lingulate, 1.1–1.4 mm, apex broad-rounded to narrowly truncate, border very broad at base (more than 0.3 width);

hyaline cells efibrillose, rhombic, mostly 1-septate but can be non-septate.

leaves triangular-lingulate, 1.2–1.4 mm;

apex with a deep lacerate split;

hyaline cells aporose, efibrillose and often septate.

long and tapering, usually strongly 5-ranked.

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

ovate-lanceolate, 0.9–1.4 mm, concave, straight, apex involute;

hyaline cells on convex surface with very small ringed pores (less than 0.25 cell width) along commissures near apex, changing abruptly to large elliptical pores (0.4 cell width or more) basally, concave surface with large round pores in proximal margins and leaf base.

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.

dioicous.

dioicous.

17–26 µm, finely papillose on both surfaces;

proximal laesura less than 0.5 spore radius.

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.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2 spreading and 2 pendent branches.;

branch stem green, cortex enlarged with retort cells.