Parasitic Fungi of Illinois. 411 



rating them. Trelease (Parasitic Fungi of Wis., p. 8) gives U. 

 heliciformis Howe, as a synonym for U. adunca. Howe's 

 description says, "appendages colored at base;" but this alone 

 would not be a sufficient specific character. There is nothing 

 else in the description by which to distinguish it from the other 

 forms on Populus. 



PHYLLACTINIA, Lev. 



(Ann. Sci. Nat, Ser. III., Tome XV., p. 144.) 



Perithecium containing several asci; appendages free from 

 the mycelium, acicular, acute at the tip, abruptly swollen 

 at base. 



P.suffulta, (Reb.) Sacc. 

 (Syl. Fung., I., p. 5.) 



Sclerotium mffuUum, Eebent. (Flor. Neom., p. 360). 

 Erysiphe coryli, fraoAni, 1)0. (Flore Franc, II., p. 273). 

 Erysiphe vagans, Bivon. (Stirp. rar. Sicil., III., p. 19). 

 Alphitomorpha guttata, Wallr. (Verb. Naturf. Freunde, I., p. 42). 

 Erysibe guttata, Lk. (Spec Plant., VI., 1, p. 116). 

 Erysihe guttata, Fr. (Syst. Mycol., III., p. 245). 

 Phyllactinia guttata, L(5v. (Ann. Sci. Nat., Ser. III., Tome XV). 



Hypophyllous. Mycelium abundant, persistent, or scant 

 and evanescent; perithecia very large, 150-250 /i, wall tissue 

 soft, cellular structure and reticulations obscure; appendages 

 few, usually 8-12, easily detached, hyaline, varying in length 

 from less than to three or four times the diameter of the 

 perithecium; asci 4 or 5 to 20 or more, ovate, pedicellate; 

 spores normally 2, occasionally 3 or 4, variable in size, mostly 

 quite large. 



On Liriodendron tulipifera: Union, Oct. (Earle). Celas- 

 trus scandens : Jersey, Oct. 14, 6307. Cratmgus tomentosa var. 

 pyrifolia: Champaign, Oct. 18 (Seymour). Cornus Florida: 

 Union, Oct. 2, 6544. Ilex decidua: Union, Oct. 7 (Earle). 

 Catalpa hignonioides : Champaign, Oct. 10, 6577^. Fraxinus 

 sps.: Union, Sept. (Earle); Champaign, Oct. (Waite). Ulmus 

 Americana: Jersey, Oct. 12, 6277. Ulmus alata: Union, 

 Oct. 2, 6543, Oct. 22, 2377. Quercus macrocarpa: Union, Oct. 

 21, 1917, Oct. 28, 2090, 2105. Quercus coccinea: Union, Oct. 

 31, 2139; Champaign, Oct. 30, 6877. Quercus tinctoria: 



