18 



1903] CULTURES OF UREDINEAE I2 



9. Puccinia Chloridis Speg. from Chloris verticillata Nutt. 

 was sown on Quamasia hyacinihina, with no infection. 



10. Puccinia Sporoboli Arth. from Sporobolus heterolepis 

 Gray was sown on Isopyrum biternatum, Oxalis cymosa, Xanthoxy- 

 lum americanum, Rides Cynosbati, Cassia Chamae crista, Symphori- 

 carpos racemosus, Verbe?ia tirticifolia, Sefiecio obovatus, Solidago 

 rigida, Helianthus Maximiliani, Boltonia asteroides, and Brauneria 

 purpurea with no infection. 



11. Puccinia purpurea Cke. from Tripsacum dactyloides L. 

 was sown on Zea Mays, with no infection. 



12. Puccinia Stipae Arth. from Stipa spartea Trin. was sown 

 on Aesculus glabra, Cassia Chamaecrista, Psoralea Onobrychis, 

 Symphoricarpos racemosus, Hydrophyllum appendiculaUun, Xan- 

 thium canade?ise, Boltouia asteroides, Laci?iaria scariosa, and Braun- 

 eria purpurea, with no infection. 



13. Puccinia Paniculariae Arth. from Panicularia americana 

 (Torr.) MacM. was sown on Bolto?iia asteroides, with no infec- 

 tion, although three sowings were made at different dates and 

 with all conditions apparently favorable. This seems to con- 

 tradict the inference of the writer drawn from field observations 

 (Bull. Torr. Bot. Club 28: 664). 



14. Puccinia emaculata Schw. from Pa?iicum capillare L. 

 was sown on Impatiens aurea, Lactuca canadensis, and Eupatorium 

 perfoliatum, with no infection. 



15. Puccinia Polygoni-amphibii Pers. from Polygo?ium emer- 

 sum (Mx.) Britt. was sown on Polygonum pe?insylva?iicum and P. 

 virgi?iia?ium, with no infection. 



Twelve species of rusts were successfully grown, that have 

 been studied with success before, and reported upon by the 

 writer and others. They are enumerated here by way of con- 

 firmation, and also in some cases because additional hosts are 

 included. The list is as follows : 



1. Uromyces Euphorbiae C. and P. June 19, aecidiospores 

 from Euphorbia humistrata Engelm. were sown on the same host, 

 and were followed by uredo on July 8, and also on E. nutans and 

 E. marginata, with no infection. July II, aecidiospores from 



