180 
Weissia Americana (P. Beauv.) Lindb. (Orthotrichum Americanum, 
Beauv. Ulota Hutchinsie, Smith.) At Chatham Hill Gap, 
on Walker Mt., on sandstone, alt. 3,000 ft. Summit of 
White Rock Mt., on white sandstone, alt. 4,400 ft. Summit 
of White Top Mt., on sandstone, alt. 5,678 ft. Brushy Mt, 
on rocks, alt. 2,600 ft. Eastern slope of White Top Mt., on 
sandstone, alt. 5,000 ft. Dickey Creek, alt. 2,500 ft. On huge 
erratic boulder in woods, growing on Umbilicaria Dilleni, alt. 
2,800 ft. 
Weissia Americana var. rufescens, E.G. B. Bull. Torr. Bot. Club, 
21: 69 (1894). Summit of White Top Mt., on trees in dense 
woods of Picea Mariana, mixed with Dicranum longifolium, 
Zygodon viridissimus and Weissia ulophylla, alt. 5,678 ft. 
Zygodon viridissimus (Dicks. Brown. On summit of White Top 
Mt., alt. 5,678 ft. On trunks of Picea rubra (Lamk.) Link., 
associated with Dicranum longifolium, Ulota crispa and Frulla- 
nia Asagrayana. Fruiting. On eastern slope of White Top 
Mt., alt. 4,800 ft.; also on spruce. Sterile. (Plate 80.) 
Zygodon excelsus (Sull.) E. G. Britton. (Syrrhopon excelsus, Sull. 
Zygodon Sullivanti, C. Muell) Western side, summit of White 
Top Mt., on wet cliffs, alt. 5,600 ft. Also on Aes rubra, on 
summit, alt. 5,678 ft., associated with Dicranum longifolium, 
Ulota crispa and Frullania Asagrayana. 
DRUMMONDIA PROREPENS (Hedw.). (Drummondia clavellata, Hook.) 
On western slope of Cove Mt., on Prunus serotina, alt. 1,000 ft. 
On western slope of Iron Mt., at Skull Gap, on trees, alt. 
3,000 ft. Along cliffs of New River, Carroll Co., on branches, 
alt. 2,200 ft. At Marion, on Prunus Cerasus, alt. 2,100 ft. On 
summit of White Rock mountain, on trees, alt. 4,400 ft. At 
Shannon Gap, on Walker Mt., on fallen trees, alt. 3,100 ft. 
Summit of Pond Mt., east of Marion, on dead trees, alt. 3,000 
ft. Dickey’s Creek, alt. 2,800 ft. 
Grimmia apocarpa (L.) Hedw. Shannon Gap, Walker Mt., alt. 
2,800 ft. On rocks in woods below the summit of White Top 
Mt., alt. 5,600 ft. 
Grimmia apocarpa (L.) Hedw. var. rivularis (Brid.) W. & M. 
Banks of the Holston River at Marion, on limestone rocks, alt. 
2,100 ft. Also at Kobenhaven's Mills, alt. 2,050 ft. 
