a a 
said 
‘tha’ 
NOTES ON THE ERYSIPHACEAE 199 
conidiiferis illis mycelii similibus, conidiis elongato-ovoideis, ca 
38-43 x 16-19 y, episporio tenuissimo. Habitat in foliis cauleque 
Acanthophylli glandulosi Bg. Taschkent, Bukhara, Tschardjui, 
a ix, 1808." : 
The original Latin diagnoses given by Speschnew are rendered 
somewhat obscure by faulty construction. As far as possible I _ 
have corrected the mistakes in the diagnoses given above. From 
the description and figures given by Speschnew I am strongly in- 
clined to think that both “4. ewphorbiae” and “E. acanthophylli” 
are to be referred to & taurica, notwithstanding the fact that 
Speschnew gives the number of spores in the ascus as 3-6 in “‘Z, 
euphordiae”’ and 8 in EF. acanthophylli, while in E. taurica, in my 
experience, the asci contain when ripe only two spores. It is to 
be noted, however, that the young asci of & ¢aurica frequently 
contain one or two, or more, drops of oily matter, which much re- 
semble immature spores. From the figures given by Speschnew, 
Tam inclined to think that this author had under observation im- 
mature asci containing young spores and oily globules. The mis- 
take of describing. these oily globules as spores has apparently 
somewhat frequently occurred. ‘“Erysiphe lanuginosa” (= £. 
faurica) on Daucus maximus, from Greece, was described by Fuckel 
(Bot. Zeitung,. 29: 27. 1871), as possessing 8-I 2-spored asci, 
but in the examination of authentic specimens I have found the 
a constantly bisporous. Two plants from Persia, in all proba- 
bility the same as those found by Speschnew, have been described 
by Magnus as “Erysiphe lanata”’ on Euphorbia lanata and “Micro- 
Sphaera Bornmuelleriana”” on Acanthophyllum glandulosum, both 
of which I have referred at p. 218 of my monograph to £. taurica. 
The asci of “£. lanata”’ were described as containing 3-5 spores and 
those of “M. Bornmuelleriana” 4-6 spores. In specimens of these 
Plants from Magnus’ herbarium, however, I have been able to find 
in the.ripe ascus only two spores. It is, however, quite possible 
t forms of E. taurica may occur with occasionally 3 or 4 spores 
in the ascus, for we must remember that this is the case with sev- 
— -€ral species which are typically bisporous, ¢. g., £. cichoracearum 
> UOncinula clandestina (Biv. Bern.) Schroet., U. polychaeta 
S S (Berk. & Curt.) Ellis, and Phyllactinia corylea (Pers.) Karst. 
