﻿Arthur: New species of Uredineae 591 



Baker, Earle & Tracy 104^. A short-cycle form corresponding to 

 Puccinia Claytoniata (Schw.) Peck, but with the teliospores slightly 

 broader, and the telia more definitely grouped. 



Puccinia Fraseri sp. no v. 



O. Pycnia not seen, probably wanting. 



III. Telia hypophyllous, sometimes also on upper surface of 

 leaf, evenly scattered over large areas, usually covering the whole 

 leaf, round, 0.2-0.5 ^nm. across, strongly pulvinate, pale cinna- 

 mon-brown, usually whitish by germination, ruptured epidermis 

 not visible; teliospores oblong, 15-21 by 37-45 At, rounded or 

 obtuse at both ends, slightly or not constricted at septum; wall 

 very pale cinnamon-brown or nearly colorless, 1.5-2.5 /x thick, 

 much thicker above, 5-9 /x, smooth ; pedicel colorless, broad, 

 6-10 IX, once length of spore or less, the wall very thin but firm. 



Urediniospores occur occasionally among the teliospores, 

 obovoid, 16-21 by 23-29 yu; wall pale yellow or nearly colorless, 

 2-3 n thick, sparsely echinulate, the pores indistinct, probably 

 3 or 4, equatorial. 



On Hieracium scabrum Michx., Pictou, Nova Scotia, June 19, 

 1909, May 25 and June 22, 1910, W. P. Fraser, the last collection 

 being taken as the type. It would be natural to infer that this 

 short-cycle, leptoform species would be correlated with the 

 common long-cycle form on the same and similar hosts. The 

 common Puccinia Hieracii occurs in the same locality on H. 

 scabrum, but its ellipsoid, verrucose teliospores indicate a different 

 relationship. I take pleasure in dedicadng the species to Mr. 

 Fraser, who has furnished all the material for its study, and who 

 is also entitled to much credit for his fine contributions to the 

 knowledge of Uredinales and especially of the Hfe history of a 

 number of species. 



Puccinia valida sp. nov. 



II. Uredinia hypophyllous, scattered unevenly, irregulariy 

 rounded or somewhat elongated, 0.3-0.7 mm. across, eariy naked, 

 pulverulent, cinnamon-brown, ruptured epidermis evident; ure- 

 diniospores elHpsoid to broadly obovoid, 17-21 by 22-28 n; wall 

 cinnamon-brown, 1.5-2 m thick, moderately echinulate, the pores 

 2, somewhat superequatorial. 



III. Telia hypophyllous, scattered, moderately pulvinate, 

 similar in appearance to the uredinia, but slightly darker; telio- 



