Flora of North America species comparison

ovate or elliptic to obovate, apex broadly acute to rounded or emarginate, short- to long-awned, margins narrowly recurved or revolute to near apex, commonly bordered distally with 2–4 rows of thicker-walled, papillose to smooth cells;

costa long-excurrent, lacking an adaxial pad of cells, distally narrow, 3–4(–6) cells across the convex adaxial surface;

distal laminal cells hexagonal, 10–15 µm wide, 1:1, strongly papillose with 2(–4)-fid papillae.

ovate to ligulate, apex rounded or occasionally broadly acute, apiculate, margins strongly recurved or revolute in distal 4/5 of leaf, sometimes bordered distally with (2–)4 rows of thicker-walled cells, or occasionally border of rhomboidal, smooth cells commonly hidden in recurvature;

costa ending in apiculus or occasionally percurrent or subpercurrent, lacking an adaxial pad of swollen cells or this poorly developed, distally not broadening, to 5–6 cells across the convex adaxial surface;

distal laminal cells hexagonal or subquadrate, 10–13 µm wide, 1:1, strongly papillose with 2-fid or multiplex papillae.

0.6–1.5 cm.

0.5–0.8 cm.

autoicous.

autoicous, but plants often bearing only antheridia or archegonia.

stegocarpic, not systylius, cylindric, erect and nearly straight, urn 1.5–2.7 mm;

peristome 300 µm, teeth of 32 filaments twisted 1/2–2 times, basal membrane low, to 50 µm;

operculum 0.6–1 mm.

stegocarpic, cylindric or ovate, erect and nearly straight, urn 1–2.5 mm;

peristome rudimentary or to 500 µm, teeth 16, irregular, divided to base and filamentous when long, straight or twisted, basal membrane very low or absent;

operculum 0.7–1 mm.

8–12 µm, spheric, finely papillose or essentially smooth.

9–11(–15) µm, spheric, finely papillose or essentially smooth.

exerted.

exerted.