261 



On Deschampsia elongata (Hook.) Munro, Orenco, Ore., June 

 13, 1396, Corvallis, Ore., July 6, 2658 (type), Glendale, Ore., 

 Aug. 17, 1408, all in 1914 by H. S. Jackson, and Bremerton, 

 Wash., July 20, 1912, E. Bartholomew 4755 (Barth., N. Am. 

 Ured. 1237, and Fungi Columb. 4460); on Agrostis Hallii Vasey, 

 Corvallis, Ore., Sept. 4, 1914, H. S. Jackson 13^6. Only the type 

 collection and the one on Agrostis show telia in addition to the 

 uredinia. When only the uredinia were known this rust was 

 mistaken for Puccinia Deschampsiae Arth., from which it differs 

 notably by the absence of uredinial paraphyses. It somewhat 

 resembles Uromyces Hordei Tracy, but may be distinguished by 

 the absence of uneven thickening in the teliosporic wall. The 

 species is dedicated to Professor H. S. Jackson, of the Oregon 

 Agricultural College, whose ability as a collector and keen 

 botanical insight have added greatly to the knowledge of Oregon 

 rusts as well as of other departments of the local botany. 



Uromyces Archerianus sp. nov. 



II. Uredinia not seen; urediniospores from telial sori globoid 

 or broadly ellipsoid, 19-23 by 21-26 ix; wall golden- to cinnamon- 

 brown, moderately thick, 2-3 ii, finely and inconspicuously 

 verrucose, the pores usually obscure, 2, equatorial. 



III. Telia hypophyllous, prominent, oblong or linear, 0.5-10 

 or more mm. long, early naked, pulvinate, blackish-brown; 

 teliospores globoid to broadly ellipsoid, 18-26 by 25-32 ^t, 

 rounded above and below; wall dark chestnut-brown, 1.5-2 n 

 thick, becoming considerably thicker above, 7-9 ^i, smooth ; 

 pedicel yellowish or colorless, firm, 3-4 ix thick, once to twice 

 length of spore. 



On Chloris elegans H.B.K., Mesilla Park, N. Mex., November 

 12, 1914 (type), February 7 and March 22, 1915, W. A. Archer. 

 In gross appearance and in microscopic characters as well, this 

 rust somewhat resembles Puccinia suhnitens and Uromyces Pecki- 

 anus, both on Distichlis. The teliospores of the new species 

 are considerably shorter, often quite globoid, and less inclined 

 to be narrowed below; the urediniospores are generally slightly 

 larger and thicker walled. The most distinctive morphological 

 character is in the uredinial pores, which are two and equatorial, 

 contrasting sharply with the six scattered pores of the other 



