Flora of North America species comparison

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

hyaline cells non-ornamented, nonseptate.

leaves generally longer than branch leaves, 1.1–1.7 mm, lingulate to lingulate-spathulate, hyaline cells mostly non-septate.

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

terete.

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.

1–1.4 mm, broadly ovate, with a narrow involute tip;

hyaline cells only slightly bulging on either surface, in proximal half of leaf aporose on convex surface and with large faint pores on concave surface;

internal commissural walls distinctly papillose; chlorophyllous cells elliptical to elliptical-triangular in transverse section, enclosed on both surfaces with the widest part in the leaf middle.

dioicous.

dioicous.

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.

ca. 31 µm, ornamented by small somewhat amalgamated granulae.

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 of 2 spreading and 1–2 hanging branches.;

branch stems with 1–2 layers of cortical cells.