Flora of North America species comparison

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

5–8 cm, scarcely 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 or spreading, distal leaves with twisted apices when dry, slightly rugose, (3.5–)5–7(–8) × 1–1.5 mm, concave proximally, tubulose distally, from an ovate-lanceolate base to a long or short subula, broadly acute, some leaves short, ovate, somewhat obtuse, forming julaceous regions, in the middle or basal part of the stems;

margins not or slightly serrate in the distal part, somewhat involute in the middle part;

laminae 1-stratose;

costa ending before the apex, 1/13–1/8 the width of the leaves at base, smooth or sometimes the distal part with two weakly serrated ridges on abaxial surface, row of guide cells, two stereid bands, adaxial and abaxial epidermal layers of cells not differentiated or sometimes a few cells in the abaxial layer differentiated;

cell walls between lamina cells not bulging;

leaf cells smooth;

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

proximal laminal cells elongate-sinuose, pitted, (42–)75–87(–107) × (7–)8–10(–16) µm;

distal laminal cells short, sinuose, pitted, (16–)30–65(–79) × (7–)9–13(–16) µm. Sexual condition pseudomonoicous;

dwarf males on rhizoids of female plants;

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

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

2–4 cm, solitary, yellow, yellowish brown or reddish yellow.

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

operculum 2–4 mm.

2–3.5 mm, arcuate, inclined, smooth, ± furrowed when dry, yellow to yellowish brown;

operculum 1.5–2 mm.

12–24 µm.

14–24 µm.