MiCROSPHAERA 127 



tips of the ultimate branches show, in this form, a sHght tendency 

 to become recurved ; the specimen in de Thiim. Fung, austr. 

 123S illustrates this form. More frequently, however, the apex 

 is closely 4-5 times branched, when the dichotomous arrange- 

 ment often ceases at the branches of the third order, and the subse- 

 quent branches are irregularly arranged, short, often very flexuous 

 and lying in different planes, with the tips not at all recurved, e. 

 g., the specimen in Rabenh. Fung. Eur. 1324. In other speci- 

 mens, again, the branching is dense, the primary branches short, 

 and the subsequent ones long, straight and narrow. 



M. enonj'jm IS confined to Europe ; the record of its occurrence 

 in California "on Euonymus'' by Harkness and Moore (159) is 

 doubtless an error. 



3. M. ASTRAGALI (DC.) Trev. [Figs. 47-51 



Fry sip he astragali DC. Fl. Fr. 6: 105. 181 5; Duby, Bot. 

 Gall. 2: 871. 1830; Tul. Sel. Fung. Carp i: 206.//. 2.f. 4. 

 1861; de Bary, Beitr. Morph. Phys. Pilz. I: § xiii. 51. 1870. 



Alphitomorpha holoscricca Wallr. Berl. Ges. Nat. Freund. Verh. 



I : 41. 1819. 



A. astragali Wallr. Ann. Wett. Ges. 4: 244. 18 19. 



Erysibe holoscricca [astragali) Lk.; Willd. Sp. PI. 6 : 115. 

 1824; Rabenh. DeutschL Krypt. Fl. i; 231. 1844. 



Erysiphc communis, & E. holoscricca Fr. Syst. Myc. 3 : 240. 

 1829. 



Alphitomorpha scricca Wallr. Fl. Crypt. Germ. 2 : 757- ^^11- 



Microsphacra holoscricca Lev. Ann. Sci. Nat. III. 15 : 159- P^- 

 g.f. 2 J (sub Calocladia). 1851. 



M. astragali (DC.) Trev., Spighe e Paglie, I : 39- 1853 (fide 

 Sacc); Sacc. Syll. Fung, i : 12. 18S2 ; Wint.; Rabenh. Krypt. 

 Fl. Deutschl. i^: 35. 1884; Jacz. Bull. I'Herb. Boiss. 4 : 746. 

 1896; Oudem. Rev. Champ. Pays.-Bas. 2: 91. i897- 



Calocladia holoscricca Lev. Dietr. Blick. Crypt. Ostseeprov. 

 336. 1856; Fckl. Symb. Myc. 82. 1869-70. 



Erysibe astragali Schroet.; Cohn's Krypt. Fl. Schles. 3: 241. 



1893. 



Exsicc: Desmaz. PI. Cr. Fr. ed. i, ser. i, 924, ^'ed. 2, sen r, 224; 

 Rab. Fung. Eur. 439, 2413; Westend. Herb. Crypt. Belg. 1059; 



