Flora of North America species comparison

green to red;

superficial cortical cells aporose Stem leaves lingulate-triangular, 1.2–1.6(–1.8) mm, apex ± involute;

border entire and broadened to about 0.25 the width of the base;

hyaline cells S-shaped, 0–1-septate, usually fibrillose in distal portion of leaf.

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.

not 5-ranked, terete.

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

ovate-lanceolate, 1–1.4 mm, imbricate to moderately spreading, concave, straight, strongly involute near apex;

hyaline cells on convex surface with elliptic pores along commissures, concave surface with large round pores away from commissures in proximal portions of leaf.

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.

20–28 µm; finely papillose on both surfaces, with distinct raised Y-shaped sculpture on distal surface;

proximal laesura 0.5 spore radius or more.

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.