192 



Mycologia 



tion is given of Pcridermiam carneum made from aecia on Pinits 

 caribaea (25282) grown under similar and controlled conditions 

 in the greenhouse at Washington, D. C, from inoculations with 

 sporidia from the telia of Coleosporium vernoniae from Vernonia 

 noveboracensis. 



Pycnia amphigenous, solitary to several, in a single extended 

 row on each side of the needles chiefly the inner, on distinctly 

 yellowed-chlorotic spots, salmon-orange to orange-chrome before 

 and at maturity, orange-rufous to auburn or chestnut after 

 maturity, 0.1-0.2 mm. wide, 0.6-1.4 mm. long, 0.4-1 mm. high, 

 averaging 0.13 by 0.57 by 0.92 mm. 



Aecia amphigenous, solitary to several, extended in a single 

 row chiefly on the inner sides of the needles, flattened laterally, 

 usually irregularly rectangular or truncate, occasionally irregu- 

 larly triangular in side view, 0.4-0.9 mm. wide, 1.5-8.4 mm. long, 

 1.8-4 nam. high, averaging 0.7 by 3.3 by 2.6 mm.; peridia some- 

 times vertically striate, rupturing longitudinally at the apex with 

 irregular edges ; peridial cells irregularly rhomboidal in cross 

 section, usually considerably overlapping, 20-38 0^33-45 fx, aver- 

 aging 27 by 29 fi, with thick walls 4-8 fx in diameter, averaging 

 5.2 fx, the inner walls, sometimes the outer, verrucose with dense 

 papillae 1-2 by 3-5 /*, averaging 1.7 by 3.8 /x ; aeciospores, obovoid 

 to ellipsoid, 16-25 by 25-38 /x, averaging 21.8-33.2 jx, with walls 

 often thickened at the apex, walls 3-9 fx thick, averaging 6/x, the 

 outer surface verrucose with tubercles .2-3 by 2-7 /x, averaging 

 1.9 by 3.9 fi. 



Coleosporium carneum (Bosc) Jackson has been found in the 

 United States as follows, the data being taken from collections 

 made by members of this office, chiefly by the senior writer : 



O and I. On Pinus: 



P. caribaea; District of Columbia,* Florida. 



P. clausa; Florida. 



P. coulteri; District of Columbia.* 



P. echinata; Alabama, Arkansas, District of Columbia,* 

 Florida, Georgia, North Carolina, South Carolina, Tennessee, 

 Texas and Virginia. 



P. glabra; Florida. 



P. mayriana; District of Columbia.* 



P. nigra autriaca; Ohio. 



P. nigra laricio; Ohio. 



