Flora of North America species comparison

irregularly branched, smooth;

paraphyllia, when present, squamiform.

± pinnate, smooth;

paraphyllia absent.

ovate, to 1.6 mm;

margins serrate, limbidium indistinctly present;

apex long, narrow, hair-point present;

costa ending before apex, abaxial surface smooth;

distal medial laminal cells short, isodiametric, 6–8 µm, multipapillose.

ovate, to 3 mm;

margins serrate, limbidium present;

apex long-acuminate, hair-point present;

costa ending before apex, abaxial surface smooth;

distal medial laminal cells hexagonal or subquadrate, 8–9 µm, 1-papillose.

1–1.5 cm, rough.

1–2 cm, rough.

inclined to horizontal, broadly oval to suborbicular, 1.2–1.8 mm;

operculum long-rostrate.

inclined to almost horizontal, oblong, 1.5–3 mm;

operculum long-rostrate.

12–15 µm, smooth.

9–12 µm, smooth.