Flora of North America species comparison

leaves generally larger than branch leaves, 1.3– 1.8 × 0.8–1 mm;

elliptic to lingulate-spatulate, widest above middle, hyaline cells nonseptate.

leaves triangular to lingulate-triangular, 0.8–1.3 mm; typically appressed;

apex acute to apiculate;

hyaline cells efibrillose and nonseptate to rarely septate.

long-cylindrical, branch leaves terete to sometimes distinctly squarrose in shade forms.

straight and somewhat tapered, usually 5-ranked;

leaves little elongate at the distal branch end.

1–1.4 mm, ovate to ovate-lanceolate, gradually narrowed to an involute tip, hyaline cells somewhat bulging on concave surface and nearly plane on convex surface, with 4–8 large, elliptic, unringed pores per cell on convex surface and 1–4 irregularly rounded pores per cell on concave surface, internal commissural walls smooth to rather strongly papillose, chlorophyllous cells ovate-triangular with the widest part at or close to the convex surface.

ovate to narrowly ovate-lanceolate; (1.1–)1.4–1.8(–3.1) mm; slightly undulate and sharply recurved when dry, somewhat subsecund;

margins entire;

hyaline cells on convex surface with usually 1 round pore on apical end, on concave surface with wall thinnings in the cell ends and angles; chlorophyllous cells broadly triangular in transverse section and very deeply enclosed on the concave surface.

dioicous.

dioicous.

21–26 µm;

proximal and distal surfaces smooth, papillae indistinct;

proximal laesura 0.5–0.6 spore radius.

19–25 µm; finely papillose on both surfaces.

fascicles typically with 3 spreading (sometimes 2) and 2 pendent branches.;

branch stems with single layer of cortical cells.

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

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