Flora of North America species comparison

leaves lingulate-spatulate, large, 1.3–1.6 mm; appressed to stem;

apex very broad and lacerate;

hyaline cells efibrillose and aporose, often septate.

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

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

strongly 5-ranked and straight.

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

ovate-lanceolate, 1.5–3 mm; straight to slightly subsecund; imbricate to somewhat reflexed and not undulate;

margins entire;

hyaline cells long and narrow, length to width ca. 10:1 on convex surface with 1 or more small pores in the cell ends and angles and often with numerous pseudopores along the margins, on concave surface with large round wall thinnings on the cell ends and angles; chlorophyllous cells triangular to trapezoidal in transverse section, apex often exposed on concave 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.

monoicous or dioicous.

monoicous.

22–34 µm;

both surfaces smooth, apparent ridged border on proximal surface;

proximal laesura more than 0.5 spore radius.

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 2 pendent branches, leaves not much elongated at distal end.;

branch stems green, with cortex enlarged with retort cells.

stems green;

cortex enlarged, with conspicuously long-necked retort cells.