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 lingulate, 0.8–1.3 mm;

apex broadly rounded and entire to lacerate, sometimes slightly mucronate or slightly denticulate;

hyaline cells rhombic, 0–1(–2)-septate, usually efibrillose.

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

long and slender to short and compact, unranked to 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-lanceolate, 1.1–1.3 mm, straight, concave, apex strongly involute;

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

dioicous.

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.

17–30 µm, finely papillose on proximal surface and pusticulate on distal surface;

proximal laesura less than 0.5 spore radius.

fascicles with 2 spreading and 2 pendent branches.;

branch stem green, cortex enlarged with retort cells.

fascicles with 2 spreading and 1–2 pendent branches.