Flora of North America species comparison

leaves to 1.7 × 1 mm, occasionally longer; rarely hemiisophyllous;

hyaline cells non-ornamented, nonseptate.

leaves triangular, 0.7–0.9 mm, appressed to stem;

apex apiculate;

hyaline cells efibrillose and nonseptate.

long and tapering, leaves ± imbricate to spreading in shade forms.

moderately tapering, leaves only moderately larger at branch tips.

broadly ovate, 2.2 × 1.3 mm, hyaline cells non-ornamented, convex surface with elliptic pores along the commissures, chlorophyllous cells isosceles-triangular to ovate-triangular in transverse section and just enclosed to just exposed on the convex surface;

end wall not thickened.

ovate-lanceolate, 1–1.4 mm; straight;

stiff, not undulate and slightly recurved;

margins entire;

hyaline cells efibrillose, convex surface with 1 pore per cell at cell apex, on concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells triangular in transverse section and well enclosed to just reaching concave surface.

dioicous.

unknown.

with numerous pseudostomata.

24–33 µm, surface finely papillose to smooth, distal surface with distinct bifurcated Y-mark sculpture;

proximal laesura more than 0.6 spore radius.

unknown.

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 1 large pore per cell on superficial cell walls.

fascicles with 2 spreading and 2 pendent branches.;

branch stems green;

cortex enlarged with conspicuous retort cells.