Flora of North America species comparison

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

2–8 cm, 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 or nearly so, spreading, little changed when dry, smooth, 3–5.5 × 0.6–1.2 mm, concave or tubulose proximally, tubulose to slightly keeled above; ovate-lanceolate, apex obtusely acute;

margins serrate near apex;

laminae 1-stratose;

costa subpercurrent to percurrent, 1/10–1/8 the width of the leaves at base, smooth or weakly toothed on abaxial surface near apex, with a row of guide cells, two weak stereid bands, at least in basal part of leaf, adaxial and abaxial epidermal layers of cells not differentiated;

cell walls between lamina cells not bulging;

leaf cells smooth;

alar cells 1- or 2-stratose in part, differentiated, not extending to costa;

proximal laminal cells linear-rectangular, pitted, (45–)65–120(–150) × (13–)16–17(–19) µm;

distal laminal cells shorter, narrow, pitted or with few pits, (20–)30–45(–60) × (5–)8–10(–13) µm. Sexual condition dioicous;

male plants about as large as the female or slightly smaller;

interior perichaetial leaves ± abruptly acuminate, convolute-sheathing.

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

1.5–3 cm, solitary, rarely two per perichaetium, yellow to reddish brown.

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

operculum 2–4 mm.

1.5–4 mm, erect, straight or nearly so, furrowed when dry, brown;

operculum 1.6–2.8 mm.

12–24 µm.

13–19 µm.