354 



THE FUNGI WHICH CAUSE PLANT DISEASE 



Teliospores flattened above and be- 

 low 3. Pileolaria. 



Teliospores not flattened, but uredinio- 



spores flattened laterally 4. Hemileia, p. 355. 



Teliospores free, 2-8 at apex of a common 

 stalk 



With all spore forms 5. Tranzschelia, p. 356. 



With pycnia and telia only 6. Polythelis. 



Teliospores not borne on a common pedicel, 

 or united into heads. 

 Teliospore wall with a more or less evi- 

 dent gelatinous layer. 

 Teliospores with evident gelatinous 

 layer, pores lateral 



Teliospores 3-celled 7. Phragmopyzis. 



Teliospores 2-celled 8. Uropyzis. 



Teliospores with obscure gelatinous 

 layer, pores apical. 

 Teliospores with appendaged i)edi- 



cels 9. Prospodium. 



Teliospores without appendaged 



pedicels 10. NepUyctis. 



Teliospore wall without gelatinous layer 

 Pycnia subcuticular, other sori sub- 

 epidermal; aecia when present with- 

 out i)eridium; uredinia when pres- 

 ent without peridium, but usually 

 with encircling paraphyses. 

 Teliospores mostly tuberculate, the 

 pores more than one and lateral 



Teliospores 1-celled 11. Trachyspora. 



Teliospores with 3 or more cells 

 clustered at the apex of the 

 pedicel 



Teliospores 3-celled 12. Triphragmium, p. 358. 



Teliospores more than 3-celled . 13. Sphaeiophragmium. 

 Teliospores with more than three 



cells lineally arranged 14. Phragmidium, p. 358. 



Teliospores mostly smooth, the p)ores 

 one in a cell and apical. 

 Teliospores 1-celled 15. Spiiechina. 



