20 



diameter of the peritliecinni. 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.Jiavescens, S. discolor, S. humilis, S. xmtio- 

 laris, S. cordata, S. glauca, Populus tremidoides, P. angidata, P. 

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

 P. monilifera. 



PHYLLAOTINIA, Lev. (Plate 3) 



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



Perilhecium containing several asci. Appendages free from the 

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



P. snflnlta, (Reb.) 



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



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



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



Alphitomorpka guttata, Wallr. Verh. Naturf. Freuude, I, p. 42. 



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



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



PhylLactinia Candollei, Lev. Grev. IV, p. 158. 



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



Phyltactinia suffutta, Sacc. MicheUa II, p. 50. 



Mostly hypophyllous. Mycelium abundant, persistent, or scant 

 and evanescent. Perithecia very large, 150-275 fi, 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, 

 variable in size, mostly large. 



On Magnolia acuminata, Liriodendron tulipifera, Berberis, 

 Kanthoxylum Americanum, Ilex decidua, Celastrus scandens, Acer 

 aaccharinuin, De&modium Canadense, Crataegus coccinea, C. tomen- 

 tosa, G. punctata, C. crus-galli, Heuchera parvifolia, Ribes Cynos- 

 bati, Hamujnelis Virginiana, Fraxinus Amencana, F. pubescejis, 



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



G. bignonioides, Gomus fiorida, G. circinata, G. stolonifera, G. 

 aericea, G. panicidata, Uhnus Americana, U. alata, Betula papy- 

 rif'era, B. nigra, B. occidentalis, Alnus serrulata, A. incana, Gory- 

 lus Americana, Ostrya Virginica, Garpinus Caroliniana, Quercus 

 macrocarpa, Q. rubra, Q. coccinea, Q. coccinea var. tinctoria, Q, 

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

 latifolia. 



This everywhere common species presents many variations in the 



