228 MICROSCOPIC FUNOI. 



irregular; spores obovate,at first hyaline, very shortly pedicellate, 

 eveu, then brown. — On leaves of Myosotis. 



Protomyces menyanthis, De Bary. Spores aggregated in 

 roundish or confluent patches, immersed in the substauce of the 

 leaves, purplish on the surface ; spores subglobose, brownish. — 

 On leaves of Menyanthis and Comarum. 



Synchytrium, De Bary. 



Cellules often numerous, aggregated, involved in a common 

 membrane, forming sori ; endochrome coloured, decidedly 

 granular; zoogonidia globose, rarely oval or oblong. 



Synchytrium Taraxaci, D. By. Cellules variable, seated 

 beneath the cuticles of living leaves ; zoogonidia globose.— On 

 leaves of Dandelion. 



Synchytrium mercurialis, Fckl. Tubercles confluent 

 on the nerves of the leaves, hemispherical, greenish, depressed 

 above, umbilicate ; sori oblong, grey ; zoogonidia globose, uni- 

 nucleate, hyaline, echinulate.— On leaves of Mercurialis perennis. 



Synchytrium Anemones, Wor. Gregarious, rounded, or 

 confluent, and irregular, purplish, then blackish ; zoogonidia 

 subglobose.— On leaves and petioles of Anemone nemwosa. 



TJSTILAGINEI, Tul. 



Ustilago, Link. 



Plant deeply seated. Spores simple, springing from delicate 

 threads, or in closely-packed cells, ultimately breaking up 

 into a powdery mass. — Berk. Out I., p. 335. 



A. Spores with epispore smooth. 



+ Spores globose, rounded oblong, or slightly flattened. 



/. Epispore brown. 



Ustilago grammica, B. and Br. Banded Smut ; forming- 



