Flora of North America species comparison

leaves broadly lingulate-spathulate to spatulate, widest at base and/or distal third, usually narrower in the mid region, 1–1.3 mm, apex narrowly to broadly truncate and ± fimbriate-lacerate, border narrow distally and expanded proximally to 0.25 width or more;

hyaline cells efibrillose, irregularly rhombic to subquadrate, many cells 2–4-septate.

leaves triangular, 1–1.7 mm, apex acute to slightly obtuse;

leaves usually appressed;

margins entire;

hyaline cells fibrillose and usually septate at base and sides.

unranked.

unranked, long and tapering, leaves greatly elongated at distal end.

ovate-lanceolate, 1.1–1.4 mm, slightly concave, straight, apex involute;

hyaline cells on convex surface grading from aporose to few small round pores near apex to numerous semi-elliptic pores along commissures in middle and base of leaf, concave surface with a few large irregular to circular pores (1–4) occupying most of the cell width.

ovate-lanceolate to lanceolate, 3–5.5 mm; straight but sometimes slightly falcate-secund; weakly undulate and recurved when dry;

margins entire;

hyaline cells on convex surface with 0–1 pore per cell, on concave surface with round wall thinnings on the apices and angles; chlorophyllous cells narrowly triangular in transverse section and just enclosed on the concave surface.

autoicous.

dioicous.

20–27 µm, moderately granulate-papillose on both surfaces, distinct raise Y-mark sculpture on distal surface;

proximal laesura less than or equal to 0.5 spore radius.

26–29 µm;

both surfaces distinctly papillose, appearing pusticulate to irregularly pusticulate;

proximal laesura mostly less than 0.5 spore radius.

fascicles with 3(4–5) spreading branches and 1–2 pendent branches.

fascicles with 2 spreading and 2 pendent branches.;

branch stems green;

cortex enlarged with conspicuous retort cells.