Flora of North America species comparison

4–15 cm, densely tomentose with whitish or reddish rhizoids.

2.5–7 cm, densely tomentose with reddish brown rhizoids.

erect to spreading, ± flexuose, little changed when dry, strongly undulate, (5.5–)7–9.5(–10.5) × 1–2 mm, lanceolate, concave proximally, keeled above, acute;

margins strongly toothed in the distal half;

laminae 1-stratose;

costa ending before apex, occupying ca. 1/16–1/8 of leaf base, strong, with two toothed ridges distally on abaxial surface, with one row of guide cells, two stereid bands, adaxial epidermal layer of cells not differentiated, abaxial layer with a few cells enlarged;

cell walls between lamina cells not bulging;

leaf cells smooth;

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

proximal laminal cells elongate, pitted, (45–)78–129(–156) × (5–)9–10(–14) µm;

distal laminal cells shorter, sinuose, pitted, (42–)64–68(–115) × (4–)9–10(–13)µm. Sexual condition pseudomonoicous;

dwarf male plants on stem rhizoids of female plants;

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

straight, erect-spreading, little changed when dry, smooth, (4–)5.5–8(–9) × 0.5–1 mm, concave below, tubulose above, from a lanceolate base to a long-acuminate subula, apices acute or sometimes ± blunt;

margins entire or slightly serrate in the distal 1/3;

laminae 1-stratose;

costa percurrent to shortly excurrent, 1/10–1/6 the width of the leaves at base, smooth to slightly rough above on abaxial surface, abaxial ridges absent, with a row of guide cells, 2 well-developed stereid bands extending almost to apex, abaxial epidermal layer of cells differentiated, rarely some cells in adaxial epidermal layer enlarged;

cell walls between lamina cells not or slightly bulging;

leaf cells smooth;

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

proximal laminal cells elongate, pitted, (16–)36–62(–112) × (3–)7–8(–20) µm;

distal laminal cells short-rectangular to irregularly angled, pitted, (9–)10–17(–31) × (3)7–8(18) µm. Sexual condition pseudomonoicous;

dwarf males on rhizoids of female plants;

interior perichaetial leaves abruptly acuminate, convolute-sheathing.

1.5–4 cm, usually aggregate, 3–6 per perichaetium, brown or reddish brown.

2.5–3.5 cm, solitary, rarely 2 per perichaetium, yellow to reddish yellow.

2–3.5 mm, arcuate, inclined to horizontal, furrowed when dry, yellowish brown or reddish brown;

operculum 2–4 mm.

2–3.5 mm, arcuate, inclined, furrowed when dry, light to dark brown;

operculum 1.5–2.8 mm.

12–24 µm.

14–22 µm.