1912] Howe,— Lichens from Nantucket 89 
Family: Usneaceae. Group: Radiatae Hue. 
Usnea florida (L.) Web., on Pinus rigida and oak-post, O'Connell 
farm, June 4-11; on cockspur thorn, Thornlot, June 4. 
Letharia thamnodes (Flot.) Hue, on Pinus rigida, O'Connell farm, 
June 4. 
Ramalina rigida (Pers.) Ach., on cockspur thorn, Thornlot, June 4; 
on Pinus rigida, O'Connell farm, June 4. 
Ramalina dilacerata (Hoffm.) Wain., on twigs, O'Connell farm, 
June 4. 
Teloschistes chrysophthalmus (L.) Norm., on cockspur thorn, Thorn- 
lot, June 4. This plant was also found in the Wheelock herbarium 
from Nantucket. 
Family: Cladoniaceae. Group: Stratosi-radiatae Hue. 
Cladonia rangiferina (L.) Web., in swamp, and on edge of bog, 
Polpis, June 15. 
Cladonia sylvatica (L.) Rabenh., on open commons, Madequet, June 
Wf 
Cladonia furcata var. racemosa Wain., on ground, Miacomet, June 11, 
and in swamp, Polpis, June 15. 
Cladonia reticulata (Russ.) Wain., on sandy plain, Madequet, June 
17; on dry bank, Reed pond, June 16; on edge of bog, Polpis, June 15; 
on open downs, Hummock pond, June 11; on dry commons, Made- 
quet, June 17. 
Cladonia verticellata (Hoffm.) Flke., in sandy swamp, Polpis, June 15. 
Cladonia fimbriata f. simplex (Weis.) Flot., in swamp on soil, Polpis, 
June 15. 
Family: Parmeliaceae. Group: Stratosae Hue. 
Parmelia perlata (L.) Ach., on Quercus tinctoria, Tuckernuck, June 
re 
Parmelia perforata var. hypotropa Nyl., on twigs, June 7; on oak- 
post and on Pinus rigida, O’Connell farm, June 4-11. Tuckerman 
did not record this variety from north of South Carolina on the 
Atlantic coast, though Dr. Riddle writes me he has seen it from Nan- 
tucket before. I have never collected it in Rhode Island where the 
typical species is common. 
Parmelia Borreri var. rudecta Tuck., on cockspur thorn, Thornlot, 
June 4. 
Parmelia caperata (L.) Ach., as above. 
Physcia parietina (L.) De Not., on rocks and trees, Coffin home- 
