Tharp: Texas Parasitic Fungi 



111 



Cercospora marrubii sp. nov. 



Spots minute, circular to subcircular, white or grayish, amphi- 

 genous, without colored or raised margin ; hyphae amphigenous 

 but principally epiphyllous, brown to olivaceous, subgeniculate, 

 pluriseptate, 100-224 X 5 ^, conidia hyaline, curved, attenuate 

 pluriseptate, 50-150 X 3~4^- 



On living leaves of Marrnbium vulgare L., Austin, Texas, /. M. 

 Lewis & B. C. Tharp. 



Cercospora mirabilis sp. nov. 



Amphigenous on circular to subcircular spots 2-5 mm. in diam- 

 eter, brown and gray zonated with gray centers, brighter colored 

 above than below ; epiphyllous conidiophores in fascicles of 12-20, 

 light-brown, subnodulose, 0-2-septate, 50-80 X4/*, arising from 

 a slightly tubercular base ; hypophyllous conidiophores differ 

 from epiphyllous in being longer (averaging 100 X 4m) fewer 

 fascicled (4-10), and in having a less tubercular base ; conidia 

 hyaline, faintly pluriseptate, straight to slightly curved, upward 

 attenuate, 80-140 X 3 fi. 



On living leaves of Mirabilis jalapa L., Austin, Texas, Oct. 

 30, 1915, B. C. Tharp. 



Cercospora modiolae sp. nov. 



Spots amphigenous, circular to subcircular, white centered with 

 dark-grayish-brown, more or less angular borders shading through 

 yellow into green, center 1-2 mm. in diameter ; hyphae amphi- 

 genous, brown, geniculate, 70-110 X 5 ^, fasciculate, fascicles 

 loose spreading; conidia straight to cycle-shaped, hyaline, usually 

 faintly pluriseptate but occasionally markedly so, attenuate 50- 

 140 X 5-6 /x. 



On living leaves of Modiola carolinia G. Don, Austin, Texas, 

 Fall of 1914, /. M. Leans & B. C. Tharp. 



Cercospora nelumbonis sp. nov. 



Spots few to several hundred per leaf, amphigenous, grayish- 

 brown above with definite dark-brown border, circular to irregu- 

 lar, 2-7 or 8 mm. in diameter, more or less indefinite and dirty- 

 brown below ; hyphae epiphyllous, fasciculate 5-25 per fascicle, 

 brown, 1-4-septate, subnodulose, 30-70 X 4-5 n ; conidia 25-95 X 

 3-4 ^, hyaline, 1-3-septate, upward attenuate. 



