20 



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

 Sporidia usually 4 or 5, sometimes 6-8. 



On Salix nigra, S. nigra var. falcata, S. aniygdaloides, S. 

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

 laris, S. cordata, S. glauca, Populus tremuloides, P. angulata, P. 

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

 P. monilifera. 



PHYLLACTINIA, Le>. (Plate 3) 



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



Perithecium containing several asci. Appendages free from the 

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



P. suffiilta, (Reb.) 



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



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



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



Alphitomorpha guttata, 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, I,ev. Grev. IV, p. 158. 



Phyllactinia guttata, I^ev. Ann. Sci. Nat. Ser. Ill, Tome XV. 



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



Mostly hypophyllous. Mycelium abundant, persistent, or scant 

 and evanescent. Perithecia very large, 150-275 p., 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 y 

 variable in size, mostly large. 



On Magnolia acuminata, Liriodendron tulipifera, Herberts, 

 Xanihoxylum Americanum, Ilex decidua, Celastrus scandens, Acer 

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

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

 bati, Hamamelis Virginiana, Fraxinus Americana, F. pubesce?is, 



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



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

 sericea, C. paniculata, Ulmus Americana, U. alata, Betula papy- 

 nfera, B. nigra, B. occidentalis, Alnus serrulata, A. incana, Cory- 

 lus Americana, Ostrya Virginica, Carpinus Caroliniana, Quercus 

 macrocarpa, 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 



