Flora of North America species comparison

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

1.5–4.5 cm, sparsely tomentose with whitish to 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.

erect-spreading or somewhat falcate-secund, rigid, erect below and flexuose above when dry, smooth, (3–)4–6(–7) × 0.5–0.8 mm, most of the leaf tips broken off, concave below to canaliculate above, from a lanceolate base to a long-acuminate, acute apex (when present);

margins entire, sometimes slightly denticulate at apex;

laminae 1-stratose or with some 2-stratose regions in patches between margin and costa;

costa excurrent, 1/5–1/4 the width of the leaves at base, smooth or slightly rough on abaxial surface in distal half, abaxial ridges absent, with a row of guide cells, two weakly developed stereid bands above and below, not extending above the leaf middle, adaxial and abaxial epidermal layers of cells not differentiated or with a few cells enlarged in both layers;

cell walls between lamina cells not or weakly bulging;

leaf cells usually smooth;

alar cells 1-stratose or with a few 2-stratose regions, well-differentiated, often extending to costa;

proximal laminal cells rectangular to short-rectangular, not pitted or with few pits, (11–)33–42(–51) × (7–)9–10(–13) µm;

median laminal cells regularly quadrate, not pitted, (9–)15–22(–26) × (5–)7–8(–11) µm;

distal laminal cells small, quadrate, not pitted.

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

1–1.6 cm, solitary, yellow to reddish brown.

dioicous;

male plants as large as females;

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

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

operculum 2–4 mm.

1.5–2.5 mm, straight, erect, smooth, slightly furrowed when dry, brown to reddish brown;

operculum 1–1.5 mm.

12–24 µm.

9–22 µm.