Flora of North America species comparison

leaves narrowly lingulate-triangular, 1.2–1.8 mm, apex acute to apiculate, border not developed much along margins and narrow at base (occupying less than 0.25 the width of the base);

hyaline cells rhombic, mostly 0–1-septate.

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

apex very broad and lacerate;

hyaline cells efibrillose and aporose, often septate.

usually strongly 5-ranked.

strongly 5-ranked and straight.

narrowly ovate-lanceolate, 1.2–1.5 mm, concave, straight, apex strongly involute, border entire, hyaline cells on convex surface with 3–9 faintly ringed rounded-elliptic pores along the commissures often quite small apically, largely aporose on concave surface.

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.

dioicous.

monoicous or dioicous.

19–28 µm; coarsely papillose on both surfaces with a distinct ridged border around perimeter of proximal surface;

proximal laesura less than 0.5 spore radius.

22–34 µm;

both surfaces smooth, apparent ridged border on proximal surface;

proximal laesura more than 0.5 spore radius.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2 spreading and 2 pendent branches, leaves not much elongated at distal end.;

branch stems green, with cortex enlarged with retort cells.