Tharp : Texas Parasitic Fungi 



1J3 



on Cassia Occident alls which, amongst the usual threads has others 

 which are slender, articulated, with longer oblong I -septate 

 spores.' " 



Our material shows conidiophores decidedly amphigenous, but 

 much more copious below, and with attenuate, denticulate, sub- 

 tortulose apices; conidia in general obclavate to cylindrical, but 

 typically with irregular undulations and thickenings which give 

 them quite a unique appearance. Mature conidia measure 

 60-130X4-5 



It also lacks the " slender articulated threads " and the " 1- 

 septate spores " which are typical of var. Cassia occidentalis. 

 General macroscopic characters are so similar, however, as to 

 make it very likely C. per sonata (B. & C.) E. & E. 



On living leaves of Cassia occidentalis L., Palestine, Texas, 

 Oct. 30, 191 5, /. M. Lewis & B. C. Tharp. 



Cercospora piaropi sp. nov. 



Spots ovate, grayish-tan centered with purplish-black borders 

 somewhat raised above, brighter above than below, 1.5-3X3-5 

 mm. in diameter, or larger by confluence ; conidiophores epi- 

 phyllous, fasciculate but very few in each fascicle, sparse, bright 

 brown with yellowish apices, denticulate, sometimes branched, 

 pluriseptate, 100—125X3.5-4.5^; conidia hyaline, truncate at 

 base, upward attenuate, pluriseptate at maturity, 80-140 X 3 



On living leaves of Piaropus crassipes (Mart.) Britton, Pales- 

 tine, Texas, Oct. 30, 1914, /. M. Lewis & B. C. Tharp. 



Cercospora populicola sp. nov. 



Spots subcircular, 5-10 mm. in diameter, amphigenous, gray- 

 brown, zonate, due to concentric zones of conidiophores ; conidio- 

 phores amphigenous, concentrically zonate, brown, multiseptate, 

 fasciculate, straight to rather subgeniculate, rarely branched, 80- 

 114X5/*; spores hyaline, slightly attenuate, multi-septate or 

 guttulate, truncate at base, curved, 50-150 X 2-3 fi. 



On living leaves of Populus deltoides Marsh. Associated with 

 an undetermined species of Volutella. Rockdale, Texas, Oct. 31, 

 1914, B. C. Tharp. 



