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.

elliptic, apex broadly acute to rounded-acute, mucronate or apiculate, margins recurved at mid leaf, bordered throughout or in lower 2/3 with 2(–3) rows of narrower, short- to long-rectangular, thicker-walled cells that are 1–2-stratose;

costa percurrent or short-excurrent, lacking an adaxial pad of cells, distally narrow, 3–4 cells across the convex adaxial surface;

distal laminal cells hexagonal to rectangular, (13–)16–24(–28) µm wide, 1–2:1, not or rarely very weakly papillose.

0.6–1.5 cm.

0.6–1.2 cm.

autoicous.

autoicous.

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, not systylius, short-cylindric and curved or ovoid and bilaterally symmetrical, nodding or occasionally nearly horizontal, urn 1–1.8 mm;

peristome weak, ca. 100–200 µm, teeth 16, not twisted, divided nearly to the base into 2–3 branches and variously perforate, basal membrane very low or absent, or rudimentary or fragmentary and attached to the inside of the operculum;

operculum 0.2–1.5 mm.

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

25–35 µm, spheric, densely papillose.

exerted.

exerted.