208 



Mycologia 



For collections of specimens and suggestions as to relationships 

 thanks are due to generous friends in various parts of the country 

 and are hereby most heartily accorded. 



A. Uredinia and telia exclusively considered 



Host belonging to genus Carex (family Cyperaceae). 

 Urediniospores with pores in an equatorial zone. 

 Pores 2 (in occasional spores 3). 



Urediniospores medium-sized (16-21 X 

 20-26 jti), wall 1-2 fi thick. 

 Urediniospores of the modified sort 



(amphispores) unknown 1. P. 



Urediniospores of the modified sort 

 (amphispores) with chestnut-brown 



wall, thicker above 2. P. 



Urediniospores very large (26-37 X 35- 



61 fx), wall 2.5-3.5 fi thick 3. P. 



Pores 3 (in occasional spores 4). 



Urediniospore-wall moderately thick (2 fx 



and more) 4. P. 



Urediniospore-wall moderately thin (2 fx 

 and less). 

 Urediniospores rather large (18-26 X 

 24-39 /*). 



Teliospores small (26-42^ long). 5. P. 



Teliospores large (39-71^) 6. P. 



Urediniospores medium-sized (15- 



21 x 19-32 fx). 



Teliospores moderately small 

 (32-45 /x long) ; urediniospore- 

 wall cinnamon-brown 7. P. Lysimachiae. 



Teliospores medium-sized (32- 

 58 ix long), urediniospore-wall 



golden-brown ' 8. P. Grossulariae. 



Teliospores large (45-67 fx long), 

 urediniospore-wall cinnamon- 

 brown 9. P. eminens. 



Pores 4, urediniospores pale yellow ; uredinio- 

 spores of the modified sort (amphispores), 



chestnut-brown with 2 equatorial pores 10. P.microsora. 



Urediniospores with pores in an extra-equatorial 

 zone. 



Pores 2, above the equator. 



Pores slightly above the equator, i. e., 

 superequatorial. 

 Urediniospores small (12-18 X 16- 



21 //,) wall golden-brown 11. P. minutissima. 



Urediniospores medium-sized (15- 



Kellermanii. 



atro-fusc'a. 

 macrospora. 



spatiosa. 



mmuta. 

 urticata. 



