64 JOURNAI. OF THE 



SPHaEROTHECA Lev. 



Perithecium containing only one asciis; appendages simple, 

 irregnlarly flexnons, frequently interwoven with the niycelinni. 



S. Castagnei, Lev. 



Ampliigen(nis; mycelinm thin, evanescent. Perithecia scat- 

 tered or subgregarions, nnmerons, small, 70-80, chestnut brown, 

 reticulations large, distinct. Appendages few, flexuou<, of uneven 

 diameter, colored, in length one to four times the diameter of the 

 perithecium, interwoven with the mycelium. Asei oval to sub- 

 orbicular 45x50. Spores eight, oval, small, 14—15. 



On Bidens, Auburn, Ala., October 20, 1889, 1020. 



S. HuMULi (D C.) Burrill (?). 



Leaves of the common hop plant were collected at Auburn, 

 Ala., in the autumn of 1889, which bore numbers of a specimen 

 probably of this species. My laboratory not being ready at that 

 time, the specimen was lost. 



ERYSIPHE (Hedav ) Lev. 



Peritliecium containing several asci ; appendages simple, irreg- 

 ularly flexuous and frequently interwoven with the mycelium. 



E. coMMUXis (Wallr.) Fr. 



Amphigenous; mycelium dens(^, persistent. Perithecia scat- 

 tered or subgregarions, 80-120, reticulations distinct. A])})end- 

 ages few, long, hyaline when young, strongly colore<l when 

 mature, frequently lying upon the mycelium. Asci three to eight 

 30—35 X 45-60, ovate, shortly j)edicellate. Spores three to eight, 

 1 5-20. 



On Oenothera biennis, Auburn, Ala., June 3, 1890, 1144; 

 C'olumbia, S. C, November 25, 1888, 635; Chamj)i()n of Eng- 

 land peas. Auburn, Ala., June, 1890, 1135. 



Tiiis is son)etimes very injurious to cultivated peas in this })art 

 of Alabama, entirely (M)vering the vines, leaves and fruit with 

 the dense mycelinn). In mature Si)ecimens the appendages are 

 very dark, clearly showing that the form on })eas cannot on 

 account of hyaline ap})endages be separated froni this species. 



