210 Monograph of the Ervsiphaceae 



Erysibe couiuiunis Rabenh. FI. Lusat. 2 : 419. (partiin). 



1840. 



E. graminis DC. Schroet.; Colin, Krypt. Fl. Schles. 3 : 240. 

 1893. 



Exsicc: Bri. & Cav. Fung. Par. 174; Lib. PI. Crypt. Ard. 

 fasc. 2, 182 ; Roumeg. Fung, Gall. Exsicc. "j^d, 1 163 ; Syd. Myc. 

 March. 1139, 1350, *346l, *4I23 ; Desmaz. PI. Cr. Fr. ed. i 

 ser. I, 1 109 (B only), *ed. 2, sen i, 509 B; Rab. Fung. Eur. 

 671 ; Karst. Fung. Fenn. Exsicc. (i^J ; Rab. Herb. Myc. ed. 2, 



473. 759; 



Myc. univ. 



257; Fckl. Fung. Rhen. 659; Westend. Herb. Crypt. Belg. 554; 



Vize, Fung. Brit. 143 ; Klotzsch, Herb. Myc. 62 ; Jack, Lein. & 



Stizenb. Krypt. Bad. 829 ; Ayres, Brit. Fung. 23 ; Ell. & Everh. 



N. Amer. Fungi, 2813; Erb. Critt. Ital. ser. i, 286 (in Herb. 



Mus. Florence); *E11. & Everh. Fung. Columb. 505 ; *Erikss. 



Fung. par. scand. exsicc. 238; *Seym. & Earle, Econ. Fung. 96. 



Usually epiphyllous, but sometimes amphigenous ; mycelium 

 more or less persistent, effused or forming scattered patches, at 

 first white, frequently becoming pale brown or gray ; perithecia 

 large, 135-280/^ in diameter, usually about 200 ix, scattered or 

 gregarious, globose-depressed, becoming concave, usually more 

 or less immersed in the lanuginose persistent mycelium, which is 

 formed of sparingly branched, curved, rather rigid thick-walled or 

 solid, shining, interlaced hyphae, 4-5 /i wide, cells of perithecium 

 obscure ; appendages rudimentaty, few or numerous, very short, 

 simple or sparingly branched, pale brown ; asci numerous, 9-30, 

 usually from 15-20, varying from cylindrical to ovate-oblong, 

 more or less longly pedicellate, 70-108 x 25-40 «.; spores 8 (or 

 rarely 4), 20-23 x 10-13 ft, seldom produced on' the living host- 

 plant. 



Hosts. — Agropyron caniniim (319), A. glaucum, A. repens, 



A. scabnim, A. tcnerum (151), Agrosds alba (263), A. examta 

 {60), Ahpcairus agrestis {'^6), Apcra Spica-Vcnti, Arrhcnathcnim 

 avcnaceum (370), Avcnafatua {66), A. sativa, Bcckmaiinia erucac- 

 formis, Bromus aspcr (319), B. brndaristatus, B. madritensis (16), 



B. mollis (3) (132) (224) (229) (319) (399), B.rubcns. B. secalinns 

 (319), B. sterilis, B. tcctorum (399). B. umoloidcs (60) (151), Dac- 

 tylis glomerata, Deschampsia cacspitosa (319), Ely mus condcnsatus 

 (363), Festuca arundinacca (176), F. clatior, F. gigantca ( ), F. 

 heterophylla (319), Glyceric! aqnatica (6), G. nervata (6), Holais 



