Flora of North America species comparison

0.1–2(–3) cm.

weakly to moderately concave, 0.5–2(–3) mm;

margins plane to strongly revolute, limbidium distinct to weak, of 1 or 2 rows of elongate incrassate cells;

apex occasionally hyaline with age;

costa short- to long-excurrent, awn brown, yellow-brown, or sometimes hyaline, smooth or rarely somewhat denticulate, 1/4–3/4 leaf length;

proximal laminal cells abruptly quadrate to rectangular, 1–2:1 away from costa, 2–4:1 along costa;

medial and distal cells long-hexagonal, 12–18(–20) µm wide, (3–)4–6:1.

with endostome segments pale tan, brown, red-brown, or rarely pale yellow.

8–14(–16) µm.

asexual reproduction rare, by deciduous brood branchlets in distal leaf axils, and rhizoidal tubers, red, spheric, 100–200 µm, cells smooth.