218 A Monograph of the Ervsiphaceae 



^ 



barium from Leveille's herbarium, labelled ** Gallia austral, ad fol. 

 PJdouiidis hcrba-venfi," which is apparently the specimen referred 

 to by Leveille in his monograph. In this specimen the perithe- 

 cium contains up to 30 asci. In authentic specimens of E. papi- 

 liofiaccariim, as well as in the example of E. Duriaei mentioned 

 above, the appendages are sometimes colorless, sometimes pale 

 brown, and we find just the same variation in these characters in 

 authentic specimens of E. taiirica on other hosts. Both plants 

 must be undoubtedly referred to E. taiirica, and it may be noticed 

 that Komarow (206, p. 39) although giving E. papilionaceanim 

 specific rank, speaks of the plant as forming a passage from tanrica 

 to Duriaei. E. lanuginosa, on Danais viaxiimis from Greece, was 

 originally described by Fuckel as " 8-i2-spored," and this descrip- 

 tion has been copied by subsequent authors. Examination of 

 authentic specimens shows however that the asci are constantly 

 bisporous, and the plant, together with that on Focnicnhtni ^nlgare 

 from Algeria, described by Trabut and Saccardo as E. lichenoides, 

 present no distinguishing characters from E. tanrica. 



In the Revue Mycologique for 1889 Sorokine published the 

 following new species of Erysiphc from Central Asia (Turkestan) ; 



xylon Auwiodcndron, E. armata on Malva 

 sp.; E. a I hag i on Alhagi cameloruni, and E. pegani on Pegannm 

 Hamala. I have not been able to see authentic specimens of 

 these plants, but from the descriptions and figures given by Soro- 

 kine, I have little hesitation in referring them all to E. faiirica, 

 I have seen an Erysiphc (representing probably E. pegani and E. 

 Saxaonli) on Pegannm Hamala and Haloxylon Avimodendron 

 from Turkestan, which is certainly E. tanrica; as regards E. alhagi 

 Komarow reports E. tanrica on Alhagi cmnclorum. Komarow 

 (206, p. 275), who has collected since in the same region as Soro- 

 kine did, has already expressed the opinion that these three 

 species were founded on immature examples of E. tanrica. 



Since the above notes were written, Magnus (233) has pub- 

 lished as new species, under the names of Ervsiphe lanata and 

 Microsphacra Bornmncllcriana, two plants occurring -respectively 

 on Euphorbia lanata and Acanthophyllnm glandnlosiim, collected 

 by Bornmuller in Persia. Both these plants I refer to E. tanrica, 



E. lanata is thus described : " Diese sch5ne Erysiphc bildet 



HaL 



