268 BROOKLYN BOTANIC GARDEN MEMOIRS 



the development of pycnia and aecia. This host is the only one on 

 which aecia have been collected in Oregon, and they are very abundant, 

 as the number of collections indicates. 



i6o. Puccinia Romanzoffiae sp. nov. 



O. Pycnia not seen. 



III. Telia chiefly hypophyllous and petiolicolous, crowded on con- 

 fluent groups, 0.5-1 mm. across or covering extensive areas on the 

 petioles, early naked, pulverulent, chestnut brown, ruptured epi- 

 dermis noticeable ; teliospores somewhat irregularly ellipsoid or oblong, 

 19-24 by 34-42 /i, rounded above and below, not or scarcely con- 

 stricted; wall chestnut brown, 2-3 ij. thick, marked by large sparsely 

 distributed irregular tubercles, thickened at apex by a low sub-hyaline 

 umbo to 4-5 iJL, pore of lower cell at septum similarly thickened; pedicel 

 colorless, short deciduous. 

 On Hydrophyllaceae : 



Romanzoffia sitchensis Bong. — Mt. JefTerson, 8,000 ft., Aug. 14, 

 1914, H. P. Barss, 23JQ, type. 



This species is distinguished from other species on this family of 

 hosts by the character of the markings of the teliospore. In P. 

 Hydrophylli Pk. the teliospores are closely and finely verrucose while 

 in P. Phaceliae Syd. & Holw. they are smooth. The character of the 

 teliospores in the latter species suggests a correlation with P. mon- 

 tanensis (cf. 136) which has aecia on Phacelia and other members of 

 the family Hydrophyllaceae. 



161. Puccinia rubefaciens Johans. Bot. Centr. 28: 394. 

 On Rubiaceae: 



Galium boreale L. — Hilgard, Union Co., July 10, 1914, 1540; 

 Austin, Grant Co., Aug. 1916, J. R. Weir, 241. 



The teliospores of this micro-form are very similar in shape and 

 size to those of the opsis-form P. ambigua (cf. 61) and the eu-form 

 P. punctata (cf. 156). These three species on Galium doubtless repre- 

 sent a series of correlated forms. 



162. Puccinia rugosa Billings, King's Rep. 40th Par. 914. 1871. 



(Not P. rugosa Speg. 1886.) 

 Puccinia Troximontis Pk. Bot. Gaz. 6: 227. 1881. 

 Puccinia Columbiensis K. & E. Proc. Phil. Acad. 1893: 153. 1893. 

 On Cichoriaceae : 



Agoseris laciniata (Nutt.) Green — Corvallis, July 10, 1915, 3215. 



163. Puccinia Saxifragae Schlecht. Fl. Berol. 2: 134. 1824. 

 Puccinia curtipes Howe, Bull. Torrey Club 5: 3. 1874. 



