Flora of North America species comparison

leaves to 1.3 × 0.7 mm; rarely hemiisophyllous;

hyaline cells non-ornamented, mostly septate.

leaves equilateral triangular, 0.8–1.1 mm; often spreading;

apex more or less obtuse;

leaves often spreading;

hyaline cells usually septate and often fibrillose in proximal half of leaf.

generally short and blunt, leaves spreading.

unranked, ± straight, leaves moderately elongated at distal end.

broadly ovate, 1.7 × 1 mm;

hyaline cells on convex surface with round to elliptic pores along the commissures, hyaline cell walls covered with papillae where overlying chlorophyllous cells; chlorophyllous cells trapezoidal to truncate-elliptic in transverse section, equally exposed on both surfaces or less exposed on convex surface, end walls thickened.

ovate-lanceolate, less than 2.2 mm, straight; undulate and sharply recurved when dry;

margins entire;

hyaline cells on convex surface with 0–1 apical pores and often with pseudopores, concave surface with to 12 round wall thinnings in cell angles and sometimes along commissures; chlorophyllous cells triangular in transverse section, just enclosed on the concave surface and broadly exposed on the convex surface.

dioicous.

unknown.

with numerous pseudostomata.

26–36 µm; more roughly papillose on distal surface than proximal surface, distinct raised, bifurcated-Y mark sculpture on distal surface;

proximal laesura 0.5 spore radius or more.

not seen.

fascicles with 2 spreading and 2–3 pendent branches.;

branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the interior end walls, mostly with 1 pore per cell on superficial cell wall.

fascicles with 2 spreading and 1–2 pendent branches.;

branch stems green, with cortex enlarged with conspicuous retort cells.