MlCROSPIIAERA 123 



12. Appendages long and penicillate. 

 Appendages not penicillate. 



13. Apex of appendages often undivided, or irregularly I-2 limes dichotomous. 



13 

 IS- 



Apex more divided. 



3. as'ragali, 



14. 



14. Appendages 4-6 times the diameter of the perithecium, branching diffuse and ir- 



13. Bdnmleri, 



regular. 



Appendages zy^-^'^A times the diameter of the perithecium, apex more divided, 



branching closer. 



2. euonymt 



15. Branching of the appendages lax, irregular. 16. 



Branching closer and regular. 



17 



16. Appendages 2-4 times the diameter of the perithecium, not contorted, ultimate 



branches long, forming a narrow fork. 7- ^^ff^^^^^- 



Appendages 1-2 times the diameter of the perithecium, more or less contorted, 



branching more irregular, with short ultimate branches. 4. alni, van htdens, 



17. Apex of appendages with very short primarj^ and secondary branches more or less 



digitate (Fig. 34). 



5. grossuiariae. 



Apex primary and secondary branches longer. I°. 



18. Apex with short, widely spreading, usually curved ultimate branches. 



4. alni, var. lonicerae. 



Apex with long, straight ultimate branches, not widely spreading. I. berberidis. 



\. M. BERBERIDIS (DC.) LcV. [FigS. 4O, 41] 



Erysiphe berberidis DC. Fl. Fr. 2 : 275. 1805; Tul. Sel. 

 Fung. Carp, i : 204. //. 5. / /• 1 86 r ; de Bary, Beitr. Morph. 



Phys. Pilz. I : §xiii. 51. 1870. 



Alphitomorpha pcnicillata, var. berberidis Wallr. Berl. Ges. Nat. 



Freund. Verb, i : 40. 18 19; Wallr. Fl. Crypt. Germ. 2: 754. 



1833- 



Erysibe berberidis DC; Gray, Nat. Arr. Brit. PI. i : 590. 182 1. 



E. divaricata^i Schlecht. Fl. Berol. 2 : 169. 1824. 

 E. pcnicillata, var. berberidis Lk. ; Willd. Sp. PI. 6 : 1 14. 1 824 ; 

 Rabenh. Deutschl. Krypt. Fl. I : 236. 1844. 



Erysiphe penicillata, var. berberidis Fr. Syst. Myc. 3 : 244. 



1829; Duby, Bot. Gall. 2: 871. 1830. 



E. penicillata Lk. ; Johnst. Fl. Berw. 2 : 143- 1831 ; Berk. ; 



Sm. Engl. Fl. 5 : 327 (partim). 1836. 



Erysibe divaricata Rabenh. Fl. Lusat. 2 : 420 (partim). 1840. 



Microsphaera berberidis \Ax. Ann. sci. nat. III. 15 : iSQ-/-^- 

 10. f. 2S{?,\xh Calocladia). 1851 ; Cooke, Micr. Fung. 219.//. 



