1918] 
BURT—CORTICIUMS CAUSING PLANT DISEASES 131 
94349, 95199, 55203); Tripoli, S. H. Burnham, 13, in part 
(in Mo. Bot. Gard. Herb., 54506). 
New Jersey: Belleplain, C. L. Shear, 1244; Newfield, J. B. 
Ellis, in Ellis, N. Am. Fungi, 330. 
Pennsylvania: Carbondale, E. A. Burt; Trexlertown, W. 
Herbst, 95. 
Maryland: Takoma Park, C. L. Shear, 1164, 1334. 
District of Columbia: Takoma Park, C. L. Shear, 965, 1041 
(the former in Mo. Bot. Gard. Herb. also). 
South Carolina: Curtis Herb., 3240, type (in Kew Herb. and 
in Curtis Herb.) ; Aiken, H. W. Ravenel, in Ravenel, Fungi 
Am., 132, 577. 
Alabama: Montgomery, R. P. Burke, 170 (in Mo. Bot. Gard. 
Herb., 43162). 
West Virginia: Paw Paw, C. L. Shear, 1171. 
Ohio: Cincinnati, C. G. Lloyd, 4508. 
Illinois: Urbana, G. L. Peltier, fourteen collections, on liv- 
ing stems of beans, carrot, tomato, radish, rhubarb, horse- 
radish, potato, winter vetch, spinach, Amaranthus, Cam- 
panula, and Plantago major (in Mo. Bot. Gard. Herb., 6264, 
8761-8765, 8816, 43836, 44677-44682). 
Montana: Evaro, J. R. Weir, 434 (in Mo. Bot. Gard. Herb., 
17725). 
Idaho: Priest River, J. R. Weir, 140, 89 in part (Mo. Bot. 
Gard. Herb., 8197, 11349). 
Colorado: Fort Worth, F. M. Rolfs, two collections, on living 
stems of potatoes. 
British Columbia: Sidney, J. Macoun, 4, 20, 83, 85, 87, 26, 154 
(in Mo. Bot. Gard. Herb., 5764, 5735, 7068, 7024, 7833, 55347, 
55350, respectively) and 39a, 151, 172 (in Macoun Herb.) ; 
Vancouver Island, J. Macoun, V89, V90, V151, V154, V172 
(in Mo. Bot. Gard. Herb., 22815, 22927, 20357, 20507, 20728, 
respectively). 
Washington: Bingen, W. N. Suksdorf, 846, 852, 863. 
The term ‘‘thread blight’’ has been frequently used in 
plant pathology with reference to tropical fungi which ascend 
stems by filamentous, mycelial strands and fructify on the 
leaves, as in the case of Corticium koleroga. Such aérial, 
