Flora of North America species comparison

to 10 cm, subpinnate, branches terete-foliate.

to 8 cm, irregularly to ± regularly pinnate, branches terete-foliate.

erect, oblong-ovate to elliptic, 1–2 mm;

margins plane, entire proximally, weakly serrulate distally;

apex abruptly acute to apiculate; ecostate or costa double, short;

alar region ± abruptly differentiated, 1-stratose, not or slightly reaching costa.

erect, ovate-lanceolate, oblong-ovate, or broadly ovate, (0.8–)1–1.5 mm;

margins plane or slightly recurved proximally, entire proximally, usually serrulate distally;

apex acute or sometimes mucronate, rarely narrowly obtuse;

costa double, short, often ending 1/4–1/2 leaf length;

alar region ± abruptly differentiated, 1-stratose, reaching costa or not.

reddish, 0.5–1.6 cm.

reddish, 1–2 cm.

autoicous.

autoicous.

cylindric, 2–3.5 mm;

annulus 2- or 3-seriate, persistent;

operculum obliquely rostrate;

exostome teeth reddish, external surface smooth or faintly roughened proximally, finely papillose apically, not perforate;

endostome segments smooth.

long-cylindric, 2.5–4 mm;

annulus 3–5-seriate, deciduous;

operculum bluntly long-conic, slightly oblique;

exostome teeth yellow-brown, external surface densely papillose, not perforate;

endostome segments smooth to papillose.

13–21 µm.

10–12 µm, smooth to finely papillose.