Flora of North America species comparison

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

4.5–10 cm, tomen-tose throughout with brown to red 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, erect-appressed when dry, smooth, (2.5–)3–4(–6.5) × 0.3–0.5 mm, from an ovate-lanceolate base to a tubulose subula, narrowly obtuse at apex, rarely acute, sometimes apical leaves of stems julaceous;

margins entire;

laminae 1-stratose, occasional 2-stratose regions near costa in proximal part of leaf;

costa subpercurrent to percurrent, 1/10–1/6 the width of the leaves at base, smooth, abaxial ridges absent, with a row of guide cells, two well developed and thick stereid bands (5–6 cells thick), adaxial epidermal layer of cells not differentiated, the abaxial layer usually with a few cells enlarged;

cell walls between lamina cells slightly bulging;

leaf cells smooth;

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

proximal laminal cells elongate-sinuose, strongly pitted, (36–)54–65(–98) × (2–)5–6(–9) µm;

distal laminal cells (11–)17–26(–42) × (2–)5–6(–12) µm. Sexual condition dioicous;

male plants as large as females;

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

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

1.5–2 cm, solitary, yellow to reddish yellow.

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

operculum 2–4 mm.

1.5–2 mm, nearly straight and erect to slightly arcuate, ± striate when dry, yellowish brown;

operculum 1–1.7 mm.

12–24 µm.

14–19 µm.