204 MYCOLOGY 



Dandelion Rust, Puccinia iaraxaci, on the dandelion Taraxacum 

 officinale, rather common in Europe, North America, Japan and the 

 East Indies. 



Reed Grass Rust, Puccinia phragmitis, with aecia on Rumex crispus, 

 R. ohtusif alius and urediniospores and teliospores on reed grass Phrag- 

 mites communis. 



Fig. 73. — Roeslelia aurantiaca on fruit oi Amelanchier intermedia corresponding 

 to Gymtiosporangium clavipes on red cedar. (Shelter Island, New York, July 16, 

 •1915-) 



Ash Rust, Puccinia fraxinata, on leaves and petioles of ash and 

 uredinospores and teliospores on salt grass, Spartina Michauxiana. 



Asparagus Rust, Puccinia asparagi, develops all of its spore forms 

 on the cultivated asparagus. 



Violet Rust, Puccinia violce, is parasitic on about forty-six different 



