268 MANUAL OF TREE DISEASES 



nate weed hosts are found throughout the country. This rust is 

 similar to several other blister-rusts which affect the pitch pine. 

 The yellow pustules project above the surface of the needles 

 from one thirty-second to one-sixteenth of an inch. The 

 alternate weed hosts are species of goldenrod and wild aster. 

 The rust is able to maintain itself on these weeds without the 

 presence of the pitch pine, by the wintering-over of the ure- 

 diniospores which reinfect the goldenrod. and aster. 



A prominent leaf blister-rust of pitch pine is caused by Cok- 

 sporium campanula (Persoon) Lev. and is known from New 

 Jersey and central Indiana southward to central North Caro- 

 lina. It differs from the other blister-rusts of pitch pine in that 

 the yellow pustules on the needles are much larger and tongue- 

 shaped. They are from one-sixteenth to one-eighth of an inch 

 long and project above the surface about one-sixteenth of an 

 inch. The alternate weed host is the tall beUflower {Cam- 

 panula americaTw). 



Another blister-rust of pitch and Norway pine is caused by 

 Coleosporiumdelicahdum (Arthur and Kem) Hedgcockand Long. 

 It is found along the Atlantic coast from Massachusetts to 

 Florida. It may have a much wider range than this, since its 

 alternate stages on the weed host, sjjecies of Euthamia, have 

 been foimd from Maine to Kansas and southward to West 

 Virginia' and Texas. The leaves of the pines show in the spring 

 very small yellow blisters, from one thirty-second to one-fourth 

 inch- long and scarcely protruding above the epidermis of the 

 needle. 



Short-leaf, long-leaf, pitch and loblolly pine are affected by a 

 needle blister-rust in central eastern and southeastern L^nited 

 States, caused by Coleosporium ipomceas (Schw.) Burrill. The 

 pustules on the pine needles are flattened, narrow and about 

 one-sixteenth of an inch long. The life historj' is completed 

 on many species of morning-glory (Ipomoea). 



Short-leaf and loblolly pines in Georgia and North Carolina 



