Flora of North America species comparison

green or yellow-green, crisped and contorted when dry, flat when moist, elliptic, broadly elliptic, or sometimes obovate or oblong, (3.5–)4–7(–10) mm;

base long-decurrent;

margins toothed to near base, teeth sharp or occasionally blunt, of 1–2(–3) cells;

apex obtuse, rounded, acute, acuminate, or rarely retuse, mucronate or cuspidate, cusp sometimes toothed;

costa percurrent or excurrent;

medial laminal cells usually elongate, short-elongate, or occasionally ± isodiametric, (35–)50–65(–85) µm, less than 1/2 size near margins, in longitudinal or diagonal rows, collenchymatous, walls pitted;

marginal cells linear, in 2–4 rows.

dark green, green, or yellow-green, crisped and contorted when dry, flat when moist, elliptic, narrowly elliptic, or occasionally ovate or oblong, (3–)5–9(–11) mm;

base broadly long-decurrent;

margins toothed to near base, teeth sharp, of 1 or 2 cells;

apex acute, acuminate, or occasionally obtuse or rounded, cuspidate, cusp toothed;

costa excurrent, percurrent, or rarely subpercurrent;

medial laminal cells usually short-elongate or ± isodiametric, 40–70(–80) µm, somewhat smaller near margins to about 1/2 size, in weakly defined longitudinal rows, rarely in diagonal rows, collenchymatous, walls pitted, pits often indistinct;

marginal cells linear, in 3–4(–5) rows.

(1–)3(–7), yellow to reddish or orange with age, 2–5 cm.

3–6(–8), reddish proximally, yellow distally, 2–4 cm.

synoicous.

dioicous.

pendent, oblong, cylindric, or narrow-ovoid, 3–4.5 mm, neck not distinct;

operculum conic-apiculate.

pendent, cylindric, 3.5–4.5 mm, neck not distinct;

operculum conic-apiculate.

20–36 µm.

20–25 µm.

stems 2–4 cm, not dendroid;

sterile stems to 8 cm.

stems 3–8 cm, not dendroid;

sterile stems to 10 cm.