132 A Monograph of the Erysiphaceae 



M. iiemopanthis Peck, Reg. Rep. 38: 102. 1886; Sacc. 

 Syll. Fung. Addit. ad Vols. I.-IV. : 2. 1886; and 9: 368. 



1 89 1. 



M, qncrcina (Schwein.) Burr. ; Burr. & Earle, Bull. 111. 

 State Lab. Nat. Hist. 2: 424 (partim). 1887; Atkins. Journ. 

 Elisha Mitch. Sci. Soc. 7 : 72. 1891 ; Burr. ; Ell. & Everh. N. 

 Anier. Pyren. 28 (partim). 1892. 



M. qucrcbia^ var. abbveviata Atkins. Journ. Elisha Mitch. Sci. 



7: Ti. 1891. 



Exsicc: Syd. Myc. March. ^247, 657, 2662, ""lejz. *3720, 



*372i, *3947> *4334» *4433 ; Fckl. Fung. Rhen. 690, 691, 695 ; 

 Lib. PI. Crypt. Ard. fasc. i, 81 ; Rab. Fung. Eur. 437, 2031, 

 *2032; Sacc. Myc. Ven. 147, 618, 619, 893 ; Desmaz. PI. Cr. 

 Fr. ed. i, ser. i, 921, 922 (A. & B.), 923, *ed. 2, sen i, 221, 

 222, 223; de Thiim. Fung, austr. 138, 139; Baxt. Stirp. Crypt. 

 Oxon.; Rehm. Ascom. 299, 446, 599, 848; Bri. & Cav. Fung, 

 par. 40; Cooke Fung. Brit, exsicc. 218 ; de Thuem. Myc. univ. 



56. 155. 557. 558, 958, 2054, 2055; Westend. Herb. Crypt. 

 Belg. 112; and 831 (in Herb. Jard. bot. Bruxelles) ; Kunze, 

 Fung, select, exsicc. 237, 318, 576 ; Rab. Herb. Myc. ed. 2,474; 

 and 462 sub Erysibc guttata, var. bettilae ; Ell. N. Amer. Fung. 

 428, 432, 659, "j^-j, J JO, 1325 ; Ell. & Everh. N. Amer. Fung. 

 660y 1539, 1945 ; and 559 sub M, Dubyi; sec. ser. 1783, 3008 ; 

 Rab.-Wint.-Pazsch. Fung. Eur. 3953 ; Rav. Fung. Amer. Exsicc. 

 87, 626, 62] ; Rav. Fung. Car. Exsicc. 67, 68 ; Vize. Fung. Brit. 

 198, 473 ; Roumeg. Fung. Gall Exsicc. 3650; Rab.-Wint. P^'ung. 

 Eur. 3044, 3245, 3744; Roumeg. Fung, select, exsicc. 4563; 

 *E11. & Everh, Fung. Columb. iii, 508; *Wartm. & Wint. 

 Schweiz. Crypt. 825 ; *Wartm. & Schenk, Schweiz. Krypt. 424; 

 Seym. & Earle, Econ. Fung. 45, 124, 176, 183, 187; VVint. 

 F'ung. Helvet. Supp. 85 (in Herb. Earle); Klotzsch. Herb. Myc. 

 178 (in Herb. Upsala Mus.); Schleich. cent, exsicc. 68 (in Herb. 

 De Candolle). 



Amphigenous ; mycelium evanescent, or persistent, and then 

 thin and usually more or less effused over the surface of the leaf, 

 or rarely (as sometimes on Quemis, Abuts, Vibiirmun and 

 Vacciniuvi) forming definite, more or less rounded patches ; peri- 

 thecia scattered or more or less densely gregarious, globose de- 

 pressed, very variable in size, usually small, 66-1 lO/i in diameter. 



