Flora of North America species comparison

red or brown.

red, brown, or sometimes yellowish brown.

green, yellowish, or occasionally dark green, slightly contorted, usually coiled and twisted when dry, sometimes to one side of stem, narrowly elliptic, narrowly ovate-elliptic, or ovate-lanceolate, 3–6 mm, proximal stem leaves narrowly triangular;

base short-decurrent;

margins pale brown, 2-stratose, toothed to below mid leaf, sometimes to near base, teeth paired, large, sharp;

apex acute or acuminate, apiculate or cuspidate, cusp sometimes toothed;

costa ending well below apex or occasionally percurrent, distal abaxial surface strongly toothed, adaxial surface occasionally toothed;

medial laminal cells ± isodiametric or short-elongate, (15–)17–26(–30) µm, slightly smaller towards margins, not in diagonal rows, sometimes in longitudinal rows, not or weakly collenchymatous, blue postmortal color absent;

marginal cells linear, in (2–)3–4 rows.

green to dark green, contorted and twisted when dry, narrowly elliptic, ovate-elliptic, or ovate-oblong, 3–4(–6.5) mm;

base long-decurrent;

margins reddish brown, 2-stratose, toothed to below mid leaf, teeth paired or sometimes single near apex, long, sharp, occasionally short and blunt;

apex acute, rounded-acute, or obtuse, apiculate or cuspidate, cusp sometimes toothed;

costa percurrent or excurrent, distal abaxial surface toothed;

medial laminal cells ± isodiametric or short-elongate, (17–)22–40 µm, smaller towards margins, often in longitudinal rows, not in diagonal rows, usually strongly collenchymatous, blue postmortal color absent;

marginal cells linear, in 2 or 3 rows.

single.

single.

dioicous.

dioicous.

pale brown, 3–5 mm;

operculum conic-mammillate, rarely short-rostrate;

exostome yellowish brown.

yellowish or yellow-brown, 2.5–6(–7) mm;

operculum short-rostrate;

exostome greenish yellow.

30–35 µm.

19–30 µm.