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 triangular to lingulate-triangular, equal to or more than 0.8 mm, spreading to appressed;

apex acute to apiculate, hyaline cells mostly efibrillose and nonseptate.

usually strongly 5-ranked.

± straight and somewhat tapered, usually 5-ranked, leaves not greatly elongated at branch distal end.

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.

narrowly ovate-lanceolate, greater than 1.2 mm, straight, slightly undulate and weakly recurved when dry, margins entire;

hyaline cells on convex surface with 1 pore per cell in apical end, on concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells in transverse section triangular to ovate-triangular and well-enclosed on the concave surface.

dioicous.

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.

24–33 µm; finely papillose on the superficial surface.

fascicles with 2 spreading and 1–2 pendent branches.

fascicles with 2 spreading and 2–3 pendent branches.;

branch stems green and often reddish at proximal end, with cortex enlarged with conspicuous retort cells.