Flora of North America species comparison

1.5–7 cm, generally branched above, somewhat tomentose with reddish brown rhizoids.

1.5–4.5 cm, sparsely tomentose with whitish to reddish brown rhizoids.

erect-spreading, slightly curled to ± straight when dry, usually with a few undulations in distal part, (3.5–)5–8(–10) mm × 0.5–1 mm, concave below, keeled above, sometimes margins ± involute, lanceolate, narrowly acute to acuminate;

margins serrulate to serrate above;

laminae 1-stratose or with few 2-stratose regions on or near the distal margins;

costa percurrent to shortly excurrent, 1/6–1/4 the width of the leaves at base, smooth to slightly papillose above on abaxial surface, abaxial ridges absent, with a row of guide cells, two stereid bands extending to the apex, adaxial epidermal layer of cells not differentiated, the abaxial layer differentiated;

cell walls between lamina cells not or slightly bulging;

leaf cells smooth to weakly papillose above on abaxial surface;

alar cells 2-stratose, differentiated, often extending to costa;

proximal laminal cells linear-rectangular, pitted, (22–)41–60(–90) × (5–)6–8(–12) µm;

distal laminal cells short-rectangular, irregularly angled or rounded, not pitted, (7–)12–20(–32) × (4–)8–9(–14) µm. Sexual condition pseudomonoicous;

dwarf males on stem rhizoids of female plants;

interior perichaetial leaves abruptly short-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.

1.2–2.5 cm, solitary, yellow to reddish yellow.

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

dioicous;

male plants as large as females;

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

2–2.7 mm, arcuate, inclined to horizontal, furrowed when dry, rarely slightly strumose, brown to reddish brown;

operculum 1.5–2.5 mm.

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

operculum 1–1.5 mm.

14–28 µm.

9–22 µm.