I. W. CloJcey— Carex Notes. 89 



collected at the same locality, belongs here. Both num- 

 bers were distributed as Car ex atrata L. from the Rocky 

 Mountain Herbarium. 



Car ex apoda belongs to the Atrarce Kunth. or Melonan- 

 thce Drej. and is probably most closely related to Carex 

 atrata L. and Carex epapillosa Mackenzie. It can be dis- 

 tinguished from these two species as well as from Carex 

 at rat if orm is Britton (Carex atrata L. var. ovata (Budge) 

 Boott) with which it might be confused, as follows : 



The margins of the perigynia much narrower than the 

 achene 



Perigynia 4 mm. long, 1.2 mm. wide. Upper lateral spikes ses- 

 sile or subsessile, lower spikes short peduncled 



Carex apoda 

 Perigynia 2.5-3 mm. long, 1.5 mm. wide. Lateral spikes on 

 slender peduncles 



Carex atratiformis Britton 



The margins of the perigynia as wide as the achene 

 Perigynia smooth, achene long stipitate 



Carex epapillosa Mackenzie 

 Perigynia granular-roughened, achene short stipitate 



Carex atrata L. 



In addition to the above, Carex apoda differs from Carex 

 atrata L. and Carex epapillosa Mackenzie, in having the 

 leaves scattered over the lowest third of the culm, not 

 clustered at the base ; the scales are about as broad and 

 noticeably shorter, not narrower and as long or longer 

 than the perigynia. Further Carex apoda differs from 

 Carex atrata L. in having" the perigynia smooth and the 

 achene long stipitate. Finally the perigynia of Carex 

 apoda, having the length more than three times the width, 

 differs from that of any other species in the group. 



Carex Paysonis sp. nov. 



Grows in clumps ; rootstock slender, light brown, cov- 

 ered with dull, light brown scales which are not fibrolous. 

 Culms light green, slender, rough below the head, 3-5 dm. 

 high, about twice the length of the leaves, phyllopodic, 

 with base surrounded by the non fibrolous remains of the 

 leaves of the previous year, dull brown not purplish 

 tinged at base. Leaves 3-6 to the fertile culm, situated 

 close to the bottom of the culm, light green, attenuated 



