Flora of North America species comparison

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

0.5–3 cm, tomentose below with whitish or 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, 4–6 × 0.2–0.4 mm, most of the leaf tips deciduous and absent, lanceolate, concave proximally, tubulose distally, apex acute;

margins entire or serrulate at apex;

laminae 1-stratose or with 2-stratose regions near apex;

costa long-excurrent, 1/6–1/4 the width of the leaves at base, abaxial ridges absent;

leaf cells smooth, with a row of guide cells, no stereid bands, 1 or 2 rows of cells above and below guide cells with slightly thickened walls and large lumens, the adaxial and abaxial epidermal layers of cells not differentiated;

cell walls between lamina cells not bulging;

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

proximal laminal cells rectangular to linear, with a few pits, (46–)60–105(–120) × (4–)6–16(–22) µm;

distal laminal cells quadrate, rounded or short-rectangular, not pitted, (12–)17–25(–32) × (8–)10–11(–12) µm. Sexual condition dioicous;

male plants as large as females;

interior perichaetial leaves gradually narrowed to a subulate apex, convolute-sheathing.

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

1.5–2.5 cm, solitary, yellow to light brown.

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

operculum 2–4 mm.

1.4–2.5 mm, straight and erect, smooth, often irregularly wrinkled when dry, yellow to light brown;

operculum 1–1.8 mm.

12–24 µm.

10–18 µm.