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, ovate-triangular to triangular-lingulate, 1–1.3 mm; appressed to spreading;

apex obtuse, hyaline cells usually fibrillose near apex.

not 5-ranked, terete.

straight to somewhat curved, leaves moderately elongate at 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.

ovate-lanceolate; usually more than 2 mm; straight; weakly undulate and slightly recurved when dry, margins entire;

hyaline cells on convex surface with numerous small free pores in proximal 2/3 of leaf and in apical region with numerous pseudopores along commissures, on concave surface with numerous round free pores;

cells relatively long and narrow in basal region, much longer than in mid region; chlorophyllous cells triangular in transverse section and well-enclosed on 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.

29–33 µm;

both surfaces very smooth;

proximal laesura long, more than 0.6 spore radius.

fascicles with 2 spreading and 1–2 pendent branches.

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

branch stems green, cortex enlarged with conspicuous retort cells.