Thamnobryum alleghaniense
Amer. Midl. Naturalist 5: 51. 1917.
Plants (3–) 5–8 (–10) cm. Secondary stem-leaves 2–3.5 × 1.4 mm. Branch leaves ovate, 1.5–2 × 0.5–0.6 mm; margins coarsely serrate at apex; apex acute to acuminate; basal laminal cells 6–10 × 1–2 µm; medial juxtacostal cells short-rhomboidal, longest axis 45° to costa, 3–5 × 1–2 µm; apical cells elongate-rhombic, 3–5 × 1–2 µm. Sexual condition synoicous or autoicous.
Habitat: Rock, logs, deeply shaded wet rock ledges, limestone cliffs, sandstone of Tsuga hardwood forests, mixed deciduous forests
Elevation: moderate elevations
Distribution
![V28 966-distribution-map.gif](/w/images/3/36/V28_966-distribution-map.gif)
N.B., N.S., Ont., Que., Ala., Ark., Conn., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Vt., Va., W.Va., Wis., Europe, Asia (China)
Discussion
Thamnobryum alleghaniense is distinguished by the elongate-rhombic apical cells of the branch leaves, and by the longest axis of medial cells near the costa oriented at a 45° angle. The branches are incurved when dry.
Selected References
None.