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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. obtusifolius and urediniospores and teliospores on reed grass Phrag- 

 mites communis. 



Fig. 73. — Roeslclia auranliaca on fruit oi Amelanchicr intermedia corresponding 

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

 19.15) 



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 



