Lichenes. 



U S N A C E AE . 



RAMALINA Ach. 

 R. RIGIDA (Pers.) Tuck. 



On trees, alt. 2,000 ft. (Nuttall, 1060). 



R. CALCICARIS FASTIGIATA Fr. 



On trees, alt. 2,000 ft. (Nuttall, 869). 

 R. MINIUSCULA Nyl. 



On Acer sacchar.inum, alt: 2,000 ft. (Nuttall, 1696). 



CETRARIA Ach. 

 C. CILIARIS (Ach.) Tuck. 



On Pinus Virginiana, alt. 1,800 ft. (Nuttall, 861). 

 C. LACUNOSA Ach. 



On Pinus Virginiana, alt. 1,800 ft. (Nuttall, 1053). 



C. AURESCENS Tuck. 



On Rhododendron maximum, alt. 1,850 ft. (Nuttall, 1050). 

 C. ISLANDICA (L.) Ach. Reindeer Moss. 



High barren places, Wood: near Nicollet (H. H. Smith). 

 C. OAKESIANA SPINULOSA Merrill ined. 



On Picea rubens (Sheldon, 3699), and on Kalmia latifolia 

 (3661). 



USNEA Ach. 



U. BARBATA (L.) Fr. 



Wirt Co., on old trees, common, Burning Springs. Ran- 

 dolph Co., on Rhododendron maximum, common, Cheat 

 Bridge. Mercer Co., on oak twigs., Bluefield ; and elsewhere 

 about State, common on trees, rocks and old fence rails 

 (Millspaugh). On trees, alt. 2,000 ft. (Nuttall, 819). 



U. BARBATA FLORIDA Fr. 



Mercer Co., on oak chips and twigs among dead leaves at 

 Bluefield (Millspaugh). On trees, alt. 2,000 ft. (Nuttall, 

 859). 



U. TRICHODES Ach. 



On spruce (Sheldon, '3693). 



THELOSCHISTES Norm. . 

 T. PARIETINUS (Linn) Norm. 



On Robinia Pseud-acacia, alt. 2,000 ft. (Nuttall, 1145). 



