Flora of North America species comparison

pale green to straw-colored;

superficial cortical with a large round pore in distal portion of cell free from cell wall.

pale green, superficial cortex of 3–4 layers of weakly differentiated cells.

green, cortex enlarged with retort cells.

not 5-ranked, quite terete, long, and slender Branch fascicles with 1– 2 spreading and 1–2 pendent branches.

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

spatulate to broad-spatulate, 0.8–1.5(–2) mm, strongly lacerate across the broad apex and often part way down the margins, border scarcely to strongly broadened at base (0.25 width of base or less);

hyaline cells rhomboid, efibrillose and often 1–2-septate.

triangular-lingulate, 1.2–1.4 mm;

apex with a deep lacerate split;

hyaline cells aporose, efibrillose and often septate.

ovate to ovate-lanceolate; 1.1–1.5(–2) mm, slightly concave, straight;

apex involute;

margins entire;

hyaline cells on convex surface with numerous pores along the commissures grading from small pores near leaf apex to large pores at base, concave surface with large round pores at leaf apex and along margins.

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.

with 2 spreading and 2 pendent branches.

often monoicous.

dioicous.

20–27 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.