108 



Mycologia 



Cercospora arboriae sp. nov. 



Spots mostly central, rarely at margin of leaf, dark-brown to 

 almost black above, more dilute-brown below, angular, 1-3 mm. 

 in diameter, margin darker ; conidiophores amphigenous but prin- 

 cipally hypophyllous, yellowish-brown, subgeniculate, 40-60 X 4 fi, 

 in loose fascicles surmounting a tuberculate base, ascending but 

 spreading, not produced till spots show a grayish-brown center; 

 conidia attenuate to obclavate, subhyaline to pale-yellow, pluri- 

 septate, 35-85 X 3~5 



On living leaves of Ampelopsis arboria (L.) Rusby, Austin, 

 Texas, Oct. 20, 1914, /. M. Lewis & B. C. Tharp. 



Cercospora bidentis sp. nov. 



Spots amphigenous, 5-8 mm. or more in diameter, circular or 

 irregular, with definite raised margin above, indefinite below ; 

 hyphae epiphyllous, fascicled 3-25 in each fascicle, brown, 50- 

 120 X 4-5 subnodulose, 2-pluriseptate ; conidia 45-150 X 3-4/*, 

 continuous, strongly attenuate upward, strongly pluriguttulate. 



On living leaves of Bidens nashii Small, Palestine, Texas, Oct. 

 30, 1 91 4, /. M. Lewis & B. C. Tharp. 



Cercospora bliti sp. nov. 



Spots dark-brown above, lighter below, very large (occasionally 

 as much as 2 X 3-4 cm.) or by confluence blighting whole leaflets ; 

 conidiophores amphiglious, those above 20-30 X 4 light-brown, 

 continuous, 5-15 fascicled surmounting a subimmersed dark- 

 brown tubercle about equal in height to the length of coni- 

 diophores ; hypophyllous conidiophores longer than epiphyllous 

 (30—65 yu.) ; subgeniculate, septate, darker brown, fewer fascicled, 

 likewise surmounting a more or less immersed tubercle; conidia 

 pale-yellow, pluriseptate, upward attenuate, 50-120X3^- 



On living leaves of Rubus sp. (blackberry), Brazoria, Texas, 

 Sept. 4, 191 5, B. C. Tharp. 



Cercospora capitati sp. nov. 



Spots dirty-brown, amphigenous, irregular, 1-4 mm. in diam- 

 eter, without raised margin ; hyphae amphigenous, loosely few- 

 fascicled, subnodulose, brown, 3-5 septate, 130-150 X 4 -5 

 conidia hyaline, straight or curved, attenuate upward, base trun- 

 cate, faintly to clearly pluriseptate, 70-220 X 3—4 



