﻿1903] CULTURES OF UREDINEAE 23 



3. PucciNiA Impatientis (Schw.) Arth.— Teleutospores from 

 Elymiis virginiciis L. sown on Impaiicfts a urea Muhl. 



4. PucciNiA SUBNITENS Diet. — Teleutosporcs from Distichlis 

 spicata (L.) Greene sown on Chowpodiiim album L. 



5. PucciNiA AMPHIGENA Diet. 



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loiigifolia (Hook.) Hack, sown on Smilax hcrhacea L. and 5. his- 

 pida Muhl. 



6. PucciNiA siMiLLiMA Arth. — Teleutospores ixom Phragmitcs 

 Phragmites (L.) Karst. sown on Anemone canadensis L. 



7. PucciNiA Caricis-Solidaginis Arth. — Teleutospores from 

 Carex Jamesii Schw. and C. stipata Muhl. sown on Solidago ca?ia- 

 densis L. and 5. seroii?ia Ait., and also from the former Carex 

 host sown on 5. caesia L., S, ulmifolia Muhl. and S. rigida L. 



It will not be out of place to emphasize again the desirability 

 of making field observations upon the association [of aecidial, 

 uredo, and teleutosporic forms within small areas. There is little 

 chance for progress in establishing the connection of spore-forms 

 through cultural work, except by acting upon the hints derived 

 from field notes. Any acute observer is likel}^ to be able to make 

 one or more important deductions of this kind during a season, 

 which may lead to valuable discoveries upon testing by cultures. 

 If collectors would bear the matter in mind, the perplexing tangle 

 of our knowledge of the heteroecious fusts would soon largely 

 yield to experimental study. 



I cannot too heartily express my appreciation of the kind- 

 ness of Professor W. A. Kellerman, Mr. W. H. Long, Jr., Rev. J. 

 M. Bates, Dr. J. J. Davis, and Mr. E. W. D. Holway, for their 

 assistance with material, and especially with suggestions derived 

 from their field observations. Without such help much of the 

 work recorded in this report could not have been undertaken. 



Purdue University, 



Lafayette, Tnd. 



