Flora of North America species comparison

1.5–3.5 cm, sparsely tomentose with light- to reddish brown rhizoids.

0.5–3 cm, tomentose below with whitish or reddish brown rhizoids.

erect-spreading, some weakly falcate-secund, crisped when dry, smooth, (3–)4–5(–7) × 0.5–0.8 mm, some leaf tips broken off, concave below, subtubulose above, narrowly lanceolate to a long, narrow subula occupied mainly by the excurrent costa, apex acute;

margins serrate to serrulate in distal half;

laminae 1- or 2-stratose above, sometimes 2-stratose in patches;

costa excurrent, 1/4–1/3 the width of the leaves at base, abaxially toothed or papillose in distal half, abaxial ridges absent, with a row of guide cells, two stereid bands not extending above the leaf middle, adaxial and abaxial epidermal layers of cells somewhat differentiated or with a few cells enlarged in both layers, cell walls between lamina cells strongly bulging in distal part of leaf lamina;

leaf cells smooth or abaxially prorate above;

alar cells mostly 1-stratose or sometimes with a few 2-stratose cells, distinctly differentiated, often extending to costa;

proximal laminal cells elongate-rectangular, not pitted or with few pits, (19–)24–33(–42) × (4)5–6(9) µm;

distal laminal cells regularly quadrate to short-rectangular, not pitted, (5–)10–11(–16) × (4)5–6(9) µm. Sexual condition dioicous;

male plants as tall as female plants but usually more slender;

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

straight, erect-spreading, little changed when dry, smooth, 4–6 × 0.2–0.4 mm, most of the leaf tips deciduous and absent, lanceolate, concave proximally, tubulose distally, apex acute;

margins entire or serrulate at apex;

laminae 1-stratose or with 2-stratose regions near apex;

costa long-excurrent, 1/6–1/4 the width of the leaves at base, abaxial ridges absent;

leaf cells smooth, with a row of guide cells, no stereid bands, 1 or 2 rows of cells above and below guide cells with slightly thickened walls and large lumens, the adaxial and abaxial epidermal layers of cells not differentiated;

cell walls between lamina cells not bulging;

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

proximal laminal cells rectangular to linear, with a few pits, (46–)60–105(–120) × (4–)6–16(–22) µm;

distal laminal cells quadrate, rounded or short-rectangular, not pitted, (12–)17–25(–32) × (8–)10–11(–12) µm. Sexual condition dioicous;

male plants as large as females;

interior perichaetial leaves gradually narrowed to a subulate apex, convolute-sheathing.

1–2 cm., solitary, brown or reddish brown.

1.5–2.5 cm, solitary, yellow to light brown.

1.5–3 mm, straight and erect, smooth, slightly furrowed when dry, reddish brown;

operculum 1.5–2 mm.

1.4–2.5 mm, straight and erect, smooth, often irregularly wrinkled when dry, yellow to light brown;

operculum 1–1.8 mm.

14–28 µm.

10–18 µm.