Flora of North America species comparison

1.5–7 cm, generally branched above, somewhat tomentose with reddish brown rhizoids.

3–8(–17) cm, densely tomentose with reddish brown rhizoids.

erect-spreading, slightly curled to ± straight when dry, usually with a few undulations in distal part, (3.5–)5–8(–10) mm × 0.5–1 mm, concave below, keeled above, sometimes margins ± involute, lanceolate, narrowly acute to acuminate;

margins serrulate to serrate above;

laminae 1-stratose or with few 2-stratose regions on or near the distal margins;

costa percurrent to shortly excurrent, 1/6–1/4 the width of the leaves at base, smooth to slightly papillose above on abaxial surface, abaxial ridges absent, with a row of guide cells, two stereid bands extending to the apex, adaxial epidermal layer of cells not differentiated, the abaxial layer differentiated;

cell walls between lamina cells not or slightly bulging;

leaf cells smooth to weakly papillose above on abaxial surface;

alar cells 2-stratose, differentiated, often extending to costa;

proximal laminal cells linear-rectangular, pitted, (22–)41–60(–90) × (5–)6–8(–12) µm;

distal laminal cells short-rectangular, irregularly angled or rounded, not pitted, (7–)12–20(–32) × (4–)8–9(–14) µm. Sexual condition pseudomonoicous;

dwarf males on stem rhizoids of female plants;

interior perichaetial leaves abruptly short-acuminate, convolute-sheathing.

erect-appressed or sometimes slightly falcate or flexuose, somewhat contorted when dry, the apex often twisted, weakly to strongly undulate, (4.5–)5–7.5(–11) × 0.7–1.2 mm, concave proximally, keeled above, lanceolate to oblong-lanceolate, broadly acute, rarely narrowly acute;

margins plane, sometimes involute at base, broadly recurved at apex, entire proximally, serrulate to serrate in the distal half;

laminae 1-stratose, sometimes with a few 2-stratose regions;

costa strong, ending before the apex, sometimes nearly percurrent, 1/6–1/3 the width of the leaves at base, smooth to serrulate above on abaxial surface, with a row of guide cells, two stereid bands extending to apex, adaxial epidermal layer of cells not differentiated, the abaxial layer diffferentiated;

cell walls between lamina cells weakly to strongly bulging abaxially and adaxially;

leaf cells smooth to ± papillose near apex on abaxial surface;

alar cells 2-stratose, differentiated, not extending to costa;

proximal laminal cells elongate, incrassate, pitted, (22–)38–61(–79) × (2–)4–6(–8) µm;

median laminal cells rectangular, pitted;

distal laminal cells short-rectangular to irregularly angled, not pitted, (7–)11–14(–28) × (4–)11–12(–17) µm. Sexual condition pseudomonoicous;

dwarf males on stem rhizoids of female plants;

interior perichaetial leaves abruptly acuminate, convolute-sheathing.

1.2–2.5 cm, solitary, yellow to reddish yellow.

2–4 cm, solitary, yellow to brown.

2–2.7 mm, arcuate, inclined to horizontal, furrowed when dry, rarely slightly strumose, brown to reddish brown;

operculum 1.5–2.5 mm.

2–2.8 mm, arcuate, inclined, furrowed when dry, ± contracted below mouth, yellow to yellowish brown or reddish brown;

operculum 2–3 mm.

14–28 µm.

14–28 µm.