240 



Mycologia 



On Pinus rigida Mill, in Georgia, Maryland, Pennsylvania, and 

 South Carolina. 



On Pinus taeda L. in Alabama, Arkansas, Florida, Georgia, 

 and South Carolina. 



The type of the species is Forest Pathology 222 17, collected by 

 Hedgcock on Pinus echinata at East Point, Atlanta, Ga., April 

 26, 1916. 



2. Peridermium terebinthinaceae sp. nov., the aecial form of 



Coleosporium terebinthinaceae (Schw.) Arthur 



Pycnia amphigenous, few, more or less aggregated near to or 

 on opposite sides from the aecia on the needles, burnt umber to 

 blackish brown, 0.15 to 0.31 mm. broad by 0.25 to 0.61 mm. 

 long, averaging 0.19 by 0.42 mm. 



Aecia tongue-shaped, few, usually clustered, fragile, 1.1 to 2.0 

 mm. high by 0.7 to 1.3 mm. long, averaging 1.4 by 0.8 mm.; 

 peridial cells ovoid to ellipsoid, sometimes angular in face view, 

 19 to 30 by 39 to 66 p averaging 30 by 50 fx, slightly overlapping, 

 with walls 3 to 6 /x thick, the inner closely and finely verrucose 

 with more or less deciduous papillae, 0.2 to 0.9 /x thick and 2.5 to 

 4.0 ix long; aeciospores, ovoid to ellipsoid, 19 to 23 by 30 to 36 /x, 

 averaging 20 by 32 /x, walls colorless, 1.8 to 4/x averaging 2.8 /x 

 in thickness, closely verrucose with somewhat deciduous tubercles, 

 0.7 to 1.6 ix, thick, and 1.0 to 2.3 /x long. 



Peridermium terebinthinaceae has been collected on the follow- 

 ing species of pine : 



On Pinus echinata in Alabama, Georgia, North Carolina, and 

 South Carolina. 



On Pinus taeda in Alabama. 



A form which may be this species has been collected on Pinus 

 pungens Michx. f. in Georgia, and on Pinus virginiana Mill, in 

 North Carolina. 



The type of the species is F. P. 20094, collected by Hedgcock 

 on Pinus echinata at Auburn, Ala., April 23, 1916. 



3. Peridermium helianthi sp. nov., the aecial form of Coleo- 



sporium heiianthi (Schw.) Arthur 



Pycnia amphigenous, few, often solitary, usually very near 

 the aecia, light brownish olive to olive, 0.2 to 0.5 mm. wide by 0.3 

 to 0.6 mm. long, averaging 0.4 by 0.5 mm. 



