I 
MILDEWS 
RUSTS AND SMUTS 
I 
z I synopsis cf the famlie^^ Peronosporaceae 
ErysithiiScii.'^ Vrcdinaceae and Ustilaginareae 
FRONTISPIECE 
Fig. 
1. Puccinia graminis, Pers., aecidial stage on leaves of barberry; 
nat. size. 
2. A cluster of aecidia or “ cluster cups ” ; the cups are too long 
in the fig. ; mag. 
2a. SeQtioi^^c^, an g.e.cidium, ..showing spores produced in 
baSipetdl chains, tkat is, with the young^ spores at the base 
SENIOR I’lUXal^AL ■^^^.V.sKIU.M, KOYAL BOTANMC GARDENS. KEv 
3. Aecidiospores; mag. 
4. Section of pycnidXuipi^pE'Sppymogoniui'n ; mag. 
5. Spermatia from pycnidium ; mag. 
6. Uredo stage bn wheat leaf ;'^nai. sEe. 
7. Uredospores, one germinating ; mag. 
8. Teleutospore form on dry wheat culm ; nat. size. 
9. Teleutospores, one germinating and producing a promycelium 
bearing three secondary spores ; mag. 
'WITH, ILLUSTRATIONS 
-'Ah 
LONDON 
DU LAV AND COMPANY, LIMIT CD 
37 SOHO SQUAKE 
1913 
