THE FUNGI WHICH CAUSE PLANT DISEASE 



389 



P. gentianae Strauss is a eu-puccinia on many species of cul- 

 tivated gentians. P. gladioli Cast occurs on gladiolus. P. gran- 

 ulans Kale. & Cke. is on cultivated Pelargoniums in France;-™ 

 P. tulipae Schr. on tulips; P. scillae Lk. on Scilla; P. schroeteri 

 Pass, on Narcissus in Europe. P. pazschkei Diet, is a lepto- 

 puccinia on cultivated saxifrages in Europe. P. horiana Hen. 



p. dianthi. After Holway. 



is destructive on Chrysanthemums in Japan. ^"' P. iridis (D. C.) 

 Duby, a hemi-puccinia, is found on many species of Iris. 

 P. cannse Hen. in its uredinial stage is destructive to Carinas 

 in the West Indies. P. persistens Plow, is heteroecious. I on 

 Thalictrum. II and III on Agropyron. P. asteris Duby. is a 

 very common lepto-puccinia on various asters. P. anemones- 

 virginianae Schw. is a lepto-puccinia common on anemone. 



Key to Uredinales Imperfecti (p. 335) 



Spores catenulate 



Peridium absent . 



Peridium present 



Toothed, body cup-shaped 2 



Fimbriate, body elongate -. 3 



Irregularly split 4, 



1. Ceeoma, p. 390. 



.fficidium, p. 390. 

 Roestelia, p. 391. 

 Peridermium, p. 390. 



Spores not catenulate 5. Uredo, p. 392. 



