168 A Monograph of the Ervsiphaceae 



8-spored, but in the specimens I have examined no ascus has con- 

 tained more than 6 spores. 



M. Gtiannonii has hitherto been recorded from only a single 

 locahty in Italy — Varallo, where it was discovered in 1891, and 

 published the next year in Briosi and Cavara's Exsiccati. I have, 

 however, seen specimens from two other Italian localities. One 

 is contained in the Herbarium of the Florence Museum. This 

 specimen was named Erysiphe Martii, '* on the leaves of Cytisris 

 Lahiirnum, Boscolongo, 1877 (Da Borzi)/' with the note attached 

 '* appendicibus longissimis hyalinis, ascis ovatis in pedicello pro- 

 ductis, 8-sporis/' The other specimen was recorded by ^[as- 

 salongo (237, p. 127) as ** M. astragali ^9 cytisiy from S. Mauro 

 di Saline, Verona, October 5, 1892. 



II. M. UMBILICI Kom. [Figs. 45, 46] 

 M. umbilici Kom. Scripta Bot. Hort. Univ. Petropol. 4 : 270- 



1895. 



J 



Amphigenous ; mycelium evanescent; perithecia scattered or 

 gregarious, 90—142 /i in diameter, cells 10—15 fi wide; appen- 

 dages 4-10, 1-1^4^ times the diameter of the perithecium, not 

 flaccid, aseptate and colorless, or brownish at base and 1-3 -sep- 

 tate, apex (? mature) 4—5 times dichotomously branched, branch- 

 ing rather close, branches of the higher orders more or less irreg- 

 ularly placed, tips of the ultimate branches not recurved ; asci 

 4-14, ovate-oblong, shortly stalked, 58-70 x 23-38 [x ; spores 3- 



5, 22-25 X 10-13 t^- 



*' 3-IyceUo arachnoideo persistente, matricis superficiem totam 



occupante. Peritheciis minutis subglobosis. Appendiculae peri- 



theciis aequantes rectae breves ad basin leniter coloratae, ramulis 



ultimis apice turgidis. Ascis in quovis perithecio 5-8, ovoideis 



vel ellipsoideis brevipedunculatis ; sporis 3-2 cylindrico ovoideis. 



Conidiiscylindricis utrinque rotundatis. Peritheciis 90—120 /i ; ap- 



pendiculis 90-130; ascis 40-54 X 30-45 ; sporis 16-22 x 8-12; 



conidiis 25-32 x 8-12 " (Kom. loc, ciL\ 



Host. — Cotyledon Scmoiovii (~ Uvibiliciis Sancnovii), 



Distribution, — Asia : Turkestan (Seravschan). 



I have not seen sufficiently mature examples of this plant to be 

 able to express an opinion as to its position. The only specimens 

 examined (from which my description was drawn up) have been those 



