246 



Mycologia 



III. Telia hypophyllous, scattered, numerous, oval or oblong, 

 0.3-0.8 mm. long, early naked, dark blackish-brown, conspicuous, 

 ruptured epidermis noticeable; teliospores broadly clavate or 

 spatulate, 15-23 by 32-63/*, apex rounded or obtuse, base usually 

 narrowed, slightly constricted at the septum ; wall dark chestnut- 

 brown, paler below, moderately thin, 1.5-2^, thicker at apex 

 7-1 3/x; pedicel slightly colored next the spore, somewhat shorter 

 than the spore. 



On Car ex pratensis Drej., Tolland, Colo., July 25 and Oct. 19, 

 1907, E. Bethel (type). 



4. Puccinia cinerea Arth., on Puccinellia airoides (Nutt.) 

 Wats. & Coult., collected at Arvada, Colo., by Mr. E. Bethel, was 

 sown April 22 on Oxygraphis Cymbalaria (Pursh) Prantl 

 (Ranunculus Cymbalaria Pursh), giving rise to pycnia April 30, 

 and aecia May 4. A duplicate sowing was made May 7, and 

 pycnia followed May 14, with aecia May 19. In each case the sori 

 were produced in abundance . 



The clue for this combination was obtained by Rev. J. M. Bates, 

 who had found the same species of rust on Poa growing in prox- 

 imity to rusted Oxygraphis in a number of places in Nebraska 

 under conditions which seemed to make their genetic connection 

 almost certain. 38 Unfortunately the culture material sent by him 

 both this year and previously failed to germinate. The plants of 

 Oxygraphis used for the cultures were supplied by him. The 

 Colorado material was received unnamed, and from its general 

 appearance was supposed to be on some species of Poa, until 

 after the work was completed when the determination was made 

 hy Mrs. Agnes Chase of the agrostological division of the 

 National Herbarium. 



5. Puccinia on Koeleria cristata. A number of collections of 

 this rust were sent by Mr. E .Bethel, who made the suggestion 

 several times that it was probably connected with aecia on Maho- 

 nia, a suggestion that seemed to us unimportant, as the aecia on 

 Mahonia in Europe are known to belong to Puccinia poculiformis, 

 a cosmopolitan rust wholly unlike the one on Koeleria. As a col- 

 lection made by Mr. Bethel April 25, 1908, at Plainview, Colo., 

 showed germination, and as he had written that " the rust on 

 Koeleria undoubtedly belongs to the aecia on Mahonia, for I have 



38 See Bull. Torrey Club 34: 584. 1907. 



