28 ERYTHEA. 



Macrosporium Panici. On living leaves of Puniciim 

 virgatum, July, 1894 (No. 1525). 



Spots small, oblong, Ix^ mm., white, with a reddish-purple 

 border. Hyphse simple, subcaespitose, multiseptate, 20-30x 

 4/i. Conidia obovate-clavate, 3-septate and sparingly muri- 

 form, 20-30x10-12/^. Accompanied by elliptical, 5x3yu, uni- 

 septate Cladospo7'ium conidia. 



Macrosporium TJredinis. Parasite on Uredo of Puccinia 

 graminis, on leaves of "volunteer" oats, Sept. 1894 (No. 1561). 



Hyphae simple, erect, smoky-hyaline, 80-110x3-^— 4 /i, septate. 

 Conidia clavate, 5 to 7-septate and sparingly muriform, mostly 

 prolonged below into a short stipe, yellowish-brown 30-50x 

 12-15//. Its peculiar host makes this an interesting species. 



Clasterisporium Kaiisense. On under side of a cotton- 

 wood post lying on the ground, Sept. 1894 (No. 1563). 



Effused, forming thin, black patches, 1-3 mm. across. 

 HyphsB very short or obsolete. Conidia oblong-fusoid, 3- 

 septate, only very slightly constricted, brown, about 20x3|- 

 4|/i. Ends obtusely pointed, straight or curved. Differs 

 from C. atrum (Lk. ) in the absence of any pedicel and the 

 uniformly 3-septate conidia. 



Cercospora didymospora. On capsules and leaves of 

 CEnothera Fremonti, July, 1894 (No. 1506). 



Spots dark gray, scattered, small (1-2 mm. diam.), subin- 

 defiaite, giving the host a clouded appearance. HyphaB 

 tafted on a tubercular base, 65-70/t diam., simple yellow- 

 brown, subentire, about 10-15x4//. Conidia subfusoid-cylin- 

 drical, nearly straight, only slightly narrowed toward the 

 ends, uniseptate but not constricted, hyaline or slightly yel- 

 lowish, 15-30x4/^. 



Cercospora physalicola. On living leaves of Physalis 

 Virginica, July, 1894 (No. 1529). 



Spots suborbicular, dark reddish-brown, ^1 cm. diam., 

 mostly bounded by a narrow black line, especially so the 

 smaller spots. Hyphse epiphyllous, tufted, olivaceous, con- 

 tinuous, subgeniculate above, 60-75x5//. Conidia hyaline, 

 110-150x5 /f, faintly 4-6 or more septate. 



