Flora of North America species comparison

leaves short-rectangular, 0.8–1.1 mm, hyaline cells mostly non-septate and absent comb-fibrils.

leaves ovate-lingulate; 1–1.3 mm, apex broadly rounded;

hyaline cells nonseptate, aporose and fibrillose in at least distal half of leaf.

2–3 spreading and 2 pendent leaves not much elongated at distal end.

ovate to ovate-elliptic, 1.4–1.8 mm;

hyaline cells on convex surface with numerous pores along the commissures;

comb-lamellae obvious only in proximal 1/2 of leaf; chlorophyllous cells broadly triangular in transverse section and well-enclosed on the convex surface.

ovate, 1–1.5 mm; straight;

not or weakly undulate or recurved when dry;

margins entire;

hyaline cells short and wide, convex surface with 1–3 small pores per cell and on concave surface with large round wall thinnings in the cell angles; chlorophyllous cells equilateral-triangular in transverse section, broadly exposed on convex surface and just reaching to well-enclosed on concave surface.

dioecious.

monoicous.

(22) 24–27(–28) µm, surface granulate.

27–42 µm;

both surfaces smooth, proximal surface with distinct bifurcated Y-mark sculpture surrounded by distinct circular border, distal surface with distinct raised border around margins;

proximal laesura usually less than 0.4 spore radius.

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

branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the end walls of cortical cells, cortical cell walls usually with large round pores.

stems green;

cortex enlarged, with conspicuously long-necked retort cells.