Flora of North America species comparison

0.5–6 cm, densely tomentose with light brown to reddish brown rhizoids.

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

falcate-secund to nearly straight, crisped to weakly crisped when dry, smooth, (1–)2–4(–5) × 0.3–0.6 mm, concave below, tubulose above, from a lanceolate or ovate-lanceolate base to an acuminate subula, apex acute;

margins smooth to serrulate above;

laminae 1-stratose;

costa percurrent or sometimes ending just before apex, 1/6–1/4 the width of the leaves at base, smooth to ± rough with papillae or small teeth on abaxial surface near apex of leaf, abaxial ridges absent, with a row of guide cells, two stereid bands above and below not extending above the leaf middle, adaxial epidermal layer of cells not differentiated, the abaxial layer with some cells differentiated;

cell walls between lamina cells not bulging;

leaf cells smooth or weakly abaxially prorate above;

alar cells 1-stratose, distinctly differentiated, not extending to costa;

proximal laminal cells elongate-rectangular, not pitted or with few pits, (12–)24–38(–70) × (4–)10–15(–18) µm;

distal laminal cells short-rectangular to quadrate, not pitted, (5–)12–14(–23) × (5–)7–12(–14) µm. Sexual condition dioicous;

male plants as large as females;

interior perichaetial leaves abruptly long-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.

1–2.5 cm, solitary, yellowish to brown.

2–4 cm, solitary, yellow to brown.

1.5–3 mm, straight and erect or nearly so, striate when dry, yellowish brown to brown;

operculum 0.5–l.6 mm.

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

operculum 2–3 mm.

12–19 µm.

14–28 µm.