PINE DISEASES 269 



have been affected by a needle blister-rust caused by Coleo- 

 sporium terebinthinacecB (Schw.) Arthur. The pustules are 

 tongue-shaped and project about one-sixteenth of an inch from 

 the needles. The life history of this fungus is completed on 

 rosin-weed (species of Silphium). 



The needles of scrub and probably of short-leaf pine from 

 Pennsylvania to Illinois and southward are attacked by Coleo- 

 sporium helianthi (Schw.) Arthur. The blisters are tongue- 

 shaped and project from the leaf about one-sixteenth of an inch. 

 The life history of the fungus is completed on sun-flower (Heli- 

 anthus). 



The needles of long-leaf, loblolly and pitch pine are attacked 

 hy Peridermium fragile Hedgcock and Hunt. The blisters are 

 narrow and inconspicuous. The alternate host for the com- 

 pletion of the life history of this fungus is not known. 



In Florida the needles of loblolly and spruce pine are attacked 

 by Peridermium minutiim Hedgcock and Hunt. The blisters 

 are low and a little narrower than long. The alternate host for 

 the completion of the life history of this rust is unknown. 



The needles of pinon are attacked by Coleosporium ribicola 

 (C. and E.) Arthur, practically throughout the range of this 

 species in Colorado, New Mexico and Wyoming. The blisters 

 appear on the pine needles while snow is still present. The 

 alternate hosts of this fungus are species of currant and goose- 

 berry (Ribes). The pustules on the currant and gooseberry 

 leaves are larger and more prominent than the felt-rust (see 

 page 274). 



References 



Arthur, J. C, and Kern, F. D. North American species of Perider- 

 mium. Bui. Torrey Bot. Club, 33 : 403-438. 1906. 



Arthur, J. C, and Kern, F. D. North American species of Perider- 

 mi um on pine. Mycologia 6 : 109-138. 1914. 



Hedgcock, G. G., and Hunt, N. Rex. New species of Peridermium. 

 Mycologia 9:239-242. 1917. 



Hedgcock, G. G. Notes on some western Uredineee which attack 

 forest trees. Mycologia 4 : 141-147. 1912. 



