Flora of North America species comparison

3–16 cm, naked or with a few whitish rhizoids, rarely moderately tomentose, rhizoids (micronemata) in rows above each leaf.

5–8 cm, scarcely tomentose with whitish to reddish brown rhizoids.

somewhat sparse, falcate-secund or erect-patent, flexuose or straight, little changed when dry, usually smooth, (6–)8–11.5(–15) × 1–2 mm, concave proximally, tubulose above, from a lanceolate to ovate-lanceolate base, gradually narrowed to a long, falcate-secund or straight, acute apex;

margins serrate in the distal half, sometimes slightly serrulate above to almost entire;

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

costa percurrent to shortly excurrent, 1/12–1/7 the width of the leaves at base, toothed distally or serrulate to nearly smooth on abaxial surface, with a double row of guide cells that is sometimes interrupted, two stereid bands extending to apex, adaxial epidermal layer of cells with some cells differentiated, the abaxial layer completely differentiated;

cell walls between lamina cells not bulging;

leaf cells smooth or abaxially prorate or toothed above;

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

proximal laminal cells elongate, pitted, (42–)71–112(–140) × (5–)9–10(–15) µm;

distal laminal cells shorter, linear to oval, pitted, (42–)47–61(–99) × (7–)10–11(–17) µm. Sexual condition pseudomonoicous;

dwarf males among 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.

2.5–5 cm, aggregate, 2–5 per perichaetium, rarely solitary, yellow to light brown.

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

2–3.5 mm, arcuate, inclined to horizontal, smooth to faintly striate when dry, dark brown or yellowish brown;

operculum 2–3 mm.

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

operculum 1.5–2 mm.

14–19 µm.

14–24 µm.