252 BROOKLYN BOTANIC GARDEN MEMOIRS 



This species may occur on the same plants with Aecidium colum- 

 biense (cf. 215) which is doubtless the aecial stage of some heteroecious 

 rust not yet determined. Sydow (1. c.) has described P. sejuncta 

 based on such a mixture. 



117. PucciNiA HoLBOELLii (Hornem.) Rostr. Middelser om Green- 



land 3: 534- 1888. 



Aecidium Holboellii Hornem. Fl. Dan. 37: 11. 1840. 



Puccinia Barbareae Cooke, Grevillea 8: 34. 1879. 



The type of P. Barbareae was described as on a "Cruciferous 

 plant" from Oregon, Dr. Lyall 61. The data on the type collection at 

 the Kew Herbarium reads "Oregon Boundary Commission, Ft. Coville 

 to Rocky Mts. 1861, Dr. Lyall 61." Since Ft. Coville is in north- 

 eastern Washington there would seem to be little chance of this col- 

 lection having been made within the state of Oregon. However, 

 since it has been recorded from our limits both in the original descrip- 

 tion and by Holway (N. Am. Ured. i: 45. 1906) it is included here 

 with the above explanation. The species undoubtedly does occur in 

 eastern Oregon as the range includes all the surrounding states. 



118. Puccinia holcina Erikss. Ann. Sci. Nat. 9: 274. 1899. 

 On Poaceae: 



Holcus lanatus L. — Corvallis, June 10, 1915, 2678, June 12, 1915, 

 3113; Toledo, Lincoln Co., July 19, 1915, 3116; Yaquina, Lincoln 

 Co., July 17, 1915, 3117; Salem, Marion Co., May i, 1914, G. H. 

 Godfrey, 3118; Portland, Aug. 19, 1915, E. Bartholomew (Barth. 

 Fungi Columb. 4852). 



Evidently a common rust in western Oregon, otherwise known 

 from North America from a few other collections made on the Pacific 

 coast from California to Vancouver Island, B. C, and from a single 

 locality along the eastern coast in Massachusetts. This species may 

 be easily separated from P. Rhamni (cf. 159) in the telial stage by the 

 evenly thickened apices of the teliospores. The urediniospores of the 

 two rusts are similar. Those of the present species are somewhat 

 larger and globoid,- 19-24 by 23-27 n, while in P. Rhamni they are 

 globoid or broadly ellipsoid, 16-20 by 18-24 /x. 



The aecial connection is unknown. The rust has evidently been 

 introduced from Europe and is able to maintain itself by over-wintering 

 urediniospores. 



119. Puccinia Hypochoeridis Oud. Nederl. Kruidk. Arch. H, i: 175. 



1872. 

 On Carduaceae: 



Hypochaeris radicata L. — Myrtle Creek, Douglass Co., June 9, 

 1914, F. D. Bailey, 254J. 



