202 KANSAS ACADEMY OF SCIENCE. 



U. flexuosa Pk., Trans. Albany Inst. VII, p. 215 (1873). "Mycelium thin, 

 web-like, evanescent; conceptacles minute, .0035 inch in diameter; appendages 

 15-25, about as long as the diameter of the conceptacle, the apical half wavy 

 flexuous and sometimes slightly thickened; sporangia 8-10, ovate or elliptical; 

 spores 8, elliptical, .0007-.0008 inch long. Figs. 10-12. Lower surface of horse- 

 chestnut leaves. Buffalo. September. G. W. Clinton. The flexuous ap- 

 pendages are characteristic of this species. They sometimes appear as if 

 twisted like the blade of a screw auger." The above description was kindly 

 communicated by Professor Peck. The number of spores for this species are 

 described as 8-10, but all specimens examined showed only six. On Aesculus 

 arguta Buckl. 



U. macrospora Pk. Trans. Albany Inst. VII, p. 215— 25th Rep. N. Y. State 

 Mus. p. 96 (1873). "Mycelium effused, persistent, conceptacles subglobose; 

 appendages numerous, 30 or more, about equal in length to the diameter of 

 the conceptacle; sporangia 8 to 12; spores two, very large, elliptical, .0012 to 

 .0015 inch long. Leaves of elm trees." Tips of appendages sometimes sep- 

 tate and coiled. On Ulmus americana L. 



U. parvula C. & P. Erysiphe of the U. S. Jour. Bot. X, p. 170 (1872). "This 

 is very distinct from Uncinula polychaeta, B. & C, which is found also on 

 Celtis. Not only is the mycelium thinner and more evanescent, but the con- 

 ceptacles are not half the diameter of those in that species, and the appendages 

 are shorter and far less numerous. Hypophyllous, mycelium effused, delicate, 

 evanescent; conceptacles scattered, globose, minute; appendages simple, nu- 

 merous, scarcely as long as the diameter of the conceptacles; sporangia 

 elliptical, rostrate; sporidia 6. On leaves of Celtis occidentalis L. Pough- 

 keepsie, N. Y. (C. H. P. n. 189)." On Celtis occidentalis L. 



U. salicis (DC.) Winter, Die Pilze, II, p. 40 (1887). Erysiphe salicis, DC. 

 Flore Franc. II, p. 273 (1805). "Cette plante n'est peut-etre qu'une variete 

 de I'erysiphe du frene, a laquelle elle ressemble absolument a I'oeil nu; ses 

 tubercules passent de meme du jaun pale a I'orange, au brun et au noir; de 

 la base du tubercule partent plusieurs fils blancs simples qui s'etaient sur la 

 feuille, s'y entre-croisent avec ceux des autres tubercules, et y forment la 

 croute blanche dont la surface de la feuille est recouverte. Cette espece 

 croit sur les feuilles du saule-daphne." Perithecia 120-160 mmm. Sporidia 

 4 or 5, usually 20-25 mmm long. On Salix amygdaloides Anders., Populus 

 monilifera Ait. 



PHYLLACTINIA Lev. Ann. Sci. Nat. Ser. Ill, Tome XV, 36 [144] (1851). 

 "Mycelium amphigenum; conceptacula hemisphaerica demum depressa recep- 

 taculo membranaceous-granuloso persistente vel evanido insidentia, sporangiis 

 8 et ultra in pedicellum protractis 2 vel 4 sporis farcta; sporae ovatae. Ap- 

 pendiculae 8-16 restae, rigidae, aciculatae demum retroflexae." 



P. corylea (Pers.) P. suffulta Sacc. Mich. II, 50 (1882). Erysiphe coryli DC. 

 Fl. Fr. II, p. 272 (1805). Sclerotium suffultum Reb. Fl. Neom. 360 (1804). 

 Sclerotium erysiphe B corylea Pers. Syn. 124 (1801). DecandoUe's description 

 (1. c.) evidently refers to Phyllactinia. Pers. name is quoted as a synonym 

 and from the description given below is evidently the same, in which his 

 variety name would have precedence over the name of Rebentisch. "Sclero- 

 tium erysiphe: Epiphyllum, granulis aggregatis fusco-nigris, tomento albo 

 insidentibus. Obs. myc. 1, p. 13. Mucor erysiphe, albus capittilis, fuscis ses- 

 silibus. Linn. Syst. Veg. 15, p. 1020. 



B Corylea: tomentum tenuissimum fungillis in disco impresso subvillosis. 

 Hab. autumno in variarum herbarum foliis, B in aversa, folii Coryli avella- 



