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 to 1.7 × 1.2 mm; rarely hemiisophyllous;

hyaline cells nonseptate to occasionally septate, comb-lamellae absent.

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 tapering.

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.

broadly ovate, to 3 × 2.3 mm;

hyaline cells on proximal half of convex surface with elliptical pores along the commissures, often with ridges running parallel to long leaf axis on hyaline cell surface overlying chlorophyllous cells; chlorophyllous cells elliptical and just enclosed on both surfaces in transverse section;

end walls not thickened.

dioicous.

dioicous.

not seen.

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.

unknown.

fascicles with 2 spreading and 2 pendent branches.;

branch stem green, cortex enlarged with retort cells.

fascicles with 2 spreading and 2 pendent branches.;

branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the interior end walls, often with large round pores on the superficial wall.