328 BOTANICAL GAZETTE. 



17. P. alta Fuckel. 



P. Alta Fung. Rhen. no. 39; Symb. Myc. 71 ; De Bary 1. c. 119: 30th Rept. N. V. 



Bot. 56, 77. 

 P. effusa var. Plantaginis Farlow Bull. Buss. Inst. I. 428. 

 Exs. Ellis N. A. F. 214. 



Conidiophores and oospores closely resembling those of slen- 

 der forms of P. effusa. 

 On Planiago major. 

 From New Hampshire (Farlow) to Wisconsin (Trelease). Europe. 



One of our commonest forms at least in the East. It forms dirty-white 

 patches of considerable extent, sometimes almost covering the whole under sur- 

 face of the leaves. Oospores are especially abundant in this form as found in 

 New England, but they can not be distinguished from those of P. effusa. Found 

 during the whole season. 



18. P. Viol.^ De Bary. 



P. Violas De Bary 1. c. 121. 



P. effusav&v. Violse Rabh. Fung. Eur. no. 1368. 



Conidiophores and oospores closely resembling those. of P- 

 effusa var. major. 



On Viola tricolor var. arvensis. 



Cobden 111. (Earle). Europe. 



The specimens received from Mr. Earle were collected in April, 1883, and 

 can be referred without doubt to this form, from their resemblance to P. effusa 

 var. major. Reference has already been made, under P. Oeranii, to a peculiar 

 monstrous form of conidia found by Mr. Earle on that species as Avell as the 

 present. Although enormously developed the abnormal conidia retain the 

 shape and violet color as well as the marked pedicels of the normal form. 

 Schroeter, in Hedwigia, XVI., 132, states that the oospores of P. Violas are like 

 those of P. effusa. No oospores were found in the Illinois specimens. 



19. P. Urticle (Lib.) De Bary. 



Botrytis Urticx Libert MSS.; Berkeley Journ. Hort Soc. London I. 31. 

 P. Urticx De Bary 1. c. 112; Cat. Par. Fun-- 30. 



" Conidiophores short, loosely 4-6 dichotomous ; divisions 

 fiexuous, tips subulate, arcuate, often defiexed . Conidia large, 

 broadly ovoid or subglobose, distinctly pedicellate; apex very 

 obtuse; membrane pale violet. Oospores medium sized, exo- 

 spore dark colored.'' — De Bar;/ I. c. 



On nettles. 



California (Harkness). Europe. 



I have not examined American specimens of this species, which is inserted 

 on the authority of Harkness and Moore. The description is taken from De 

 Bary. 



20. P. Ficari.e Tub 



Comptes Rendus 1854; De Bary 1. c. 113 ; Bull. Buss. Inst. H. 233; Cat. Pac 



Fung. 29. 

 Exs. Ellis X. A. I'. 215. 



Conidiophores rather short and slender, several times dicho- 

 tomous, tips usually straight, spinose, spreading. Conidia violet, 



