114 



Mycologia 



Cercospora pulcherrimae sp. nov. 



Spots amphigenous, suborbicular, centers grayish, 1-3 mm. in 

 diameter, surrounded by a dark-brown border in turn surrounded 

 by a borad more or less chlorotic zone which shades gradually 

 into normal green, much brighter above than below ; conidiophores 

 amphigenous, those on upper surface densely fasciculate and 

 clustered at centers of spots giving them a sooty appearance, 

 brown, septate, slightly flexuous, subdenticulate, measuring up to 

 150X4-5/*; those on lower surface few (2-8) in fascicle, and 

 spread evenly over surface of spot, measuring up to 270 X 4—5 

 in other respects similar to those on upper surface ; conidia 

 hyaline, multiseptate, truncate at base, attenuate, slightly curved, 

 measuring up to 270 X 3-4 /* (averaging 175 X 3-5 /*)• 



On living leaves of Euphorbia pulcherrima Willd., Austin, 

 Texas, Jan. 29, 1916, McAllister & B. C. Tharp. 



Cercospora pulcherrimae minima var. nov. 



Spots very similar, except smaller, to spots described above. 

 Microscopically it has the following differences : Epiphyllous 

 conidiophores short (25—45/*) rigid, truncate, hypophyllous coni- 

 diophores not exceeding 100/x in length, denticulate many (30- 

 40) in fascicle, semirigid, truncate; conidia never more than 170/x, 

 long. 



On living leaves of Euphorbia pulcherrima Willd., Victoria, 

 Texas, Oct. 18, 191 5, H. C. Millender. 



Cercospora regalis sp. nov. 



Spots amphigenous, suborbicular, brown, 1-2 cm. in diameter ; 

 conidiophores principally epiphyllous, simple, straight or curved, 

 multiseptate, brown, paling toward the tips, reaching a maximum 

 of 460 u long X 5 ft in diameter ; conidia hyaline, multiseptate, 

 curved or straight, attenuate, reaching a maximum of 280 X 4/*- 



On living leaves of Passi flora sp., Mission, Texas, Nov. 5, 191 5, 

 B. C. Tharp. 



Cercospora rosigena sp. nov. 



Spots irregularly orbicular, 4-14 mm. (averaging 5-7 mm.) in 

 diameter, uniformly brown, brighter above than below, margin 

 slightly reddish above; surrounding tissue sometimes yellowish 

 but usually not noticeably so ; conidiophores amphigenous, brown, 

 in tufts of 2-12, continuous, or occasionally i-septate, sharply 



