SUMMARY OF BASIDIOMYCETES 403 



Asparagus Rust. Asparagus is often attacked by a Rust 

 (Puccinia Asparagi) which is a type of those having but one 

 host. The uredospores, teleutospores, and aecidiospores all occur 

 on the Asparagus. 



Some other forms of Rusts of some importance occur on Clover, 

 Alfalfa, Beans, Peas, Beets, Timothy, Corn, Peach trees, etc. 



Summary of Basidiomycetes. Like the Ascomycetes the 

 Basidiomycetes are parasites or saprophytes on land plants and 

 have no motile spores. The Basidiomycetes are supposed to 



teleutospore 



aecidiospores 



FIG. 361. Diagram showing life history of the Cedar Rust Fungus. A, 

 Cedar tree; B, Apple tree. The sporidia from the teleutospores infect the 

 Apple tree and the aecidiospores produced on the Apple foliage during summer 

 reinfect the cedars. From Technical Bulletin 9, Virginia Agr. Exp. Sta. 



have been evolved from the Ascomycetes, and hence are farthest 

 removed from the Algae, which they resemble very little. 



In such Basidiomycetes as the Toadstools and Puffballs, the 

 most highly developed sporophores occur, while in the parasitic 

 Basidiomycetes, as the Smuts and Rusts, the mycelium is scat- 

 tered through the host and is only visible through the production 

 of spore masses. 



Such forms as the Toadstools, Mushrooms, and Puffballs 

 reproduce entirely by basidiospores, while in the reproduction 

 of the Smuts brand and basidiospores are involved, and in the 

 reproduction of Rusts there are four kinds of functional spores 

 uredo-, teleuto-, basidio-, and aecidiospores, and the non- 

 functional spermatia. 



