20 



diameter of the peritliccimu. Asci from 4 or 5 to 12 or more, ovate. 

 Sporidia usually 4 or 5. sometimes 6-8. 



On Sffl/'x nigra, S. nigra var. falcata, S. amygdaloides, S. 

 longifolia, S. rostrata, S.flavescens, S. discolor, S. humilis, S. petio- 

 /'/>'/*, S. cordata, S. glauca, Populus tremuloides, P. ungidata, P. 

 grandidentata, P. heterophylla, P. balsamifera var. candicans, 

 P. monilifera. 



PHYLLACTINIA, Lev. (Plate 3) 



Ann. vSci. Nat. Ser. Ill, Tome XV, p. 144. 



Peritliecium containing several asci. Appendages free from the 

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



P. suffiilta, (Reb.) 



Sclerotium snffitltum, Reb. Flor. Neom. p. 360. 



Erysipke Coryli, Fraxini, DC. Flore Franc. II, p. 273. 



Erysiphe vagans, Bivon. Stirp. rar. Sicil, III, p. 197. 



Alphitomorpha g-uttata, Wallr. Verh. Naturf. Freunde, I, p. 42, 



Erysibe guttata, I^k. Spec. Plant. VI, I, p. 116. 



Erysibe guttata, Fr. Syst. Mycol. Ill, p. 245. 



Phyllactinia Candollei, L,ev. Grev. IV, p. 158. 



Phyllactinia guttata, Lev. Ann. Sci. Nat. Ser. Ill, Tome XV. 



Phyllactinia suffulta, Sacc. Michelia II, p. 50. 



Mostly hypophyllous. Mycelium abundant, persistent, or scant 

 mid evanescent. Perithecia very large, 150-275 JJL, 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. Sporidia normally 2, occasionally 3 or 4 7 

 variable in size, mostly large. 



On Magnolia acuminata, Liriodendron tulipifera, JBerberix, 

 Xanthoxylum Americanum, Ilex decidua, Celastrus scandens, Acer 

 sacckarinum, Desmodium Canadense, Cratcegus coccinea, C. tomen- 

 tosa, C. punctata, C. crus-galli, Heuchera parvifolia, fiibes Cynos- 

 bati, Hamamelis Virginiana, Fraxinus Americana, F. pubescens, 

 F. viridis, F. sambucifolia, Asclepias Cornuti, Catalpa speciosa, 

 C. bignonioides, Cornus florida, C. circinata, C. stolonifera, C. 

 sericea, C. panicidata, Ulmus Americana, U. alata, JBetula papy- 

 I'ifera, B. nigra, B. occidentalis, Alnus serndata, A. incana, Cory- 

 J us Americana, Ostrya Virginica, Carpinus Caroliniana, Quercus 

 niavrocarpa, Q. rubra, Q. coccinea, Q. coccinea var. tinctoria, Q. 

 falcata, Castanea sativa var. Americana, Fagus ferruginea, Typha 

 latifolia. 



This everywhere common species presents many variations in the 



