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 lingulate-triangular to triangular-lingulate, equal to or less than 1.2 mm, more or less spreading;

apex obtuse;

hyaline cells mostly fibrillose and nonseptate.

unranked.

straight to distinctly curved, leaves becoming substantially longer at distal end of the branch.

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, 1.5–2 mm, straight to slightly subsecund, only slightly undulate and recurved if at all;

margin entire;

hyaline cells on convex surface with numerous small free pores, on concave surface with numerous round free pores, cells relatively short in basal region (similar to mid region); chlorophyllous cells ± triangular in transverse section, just reaching concave surface or slightly enclosed.

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.

25–32 µm, finely papillose on both surfaces.

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

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

branch stems green, with cortex enlarged with conspicuous retort cells.