﻿Mackenzie: Notes on Carex 407 



very narrow spiked forms have been called Carex stricta var. 

 xerocarpa (S. H. Wright) Britton. However, the original Carex 

 angustata Boott, on which the variety angustata is founded, is a 

 plant from the Oregon-Washington region, and is entirely distinct 

 from the eastern species. The narrow spiked specimens of the 

 eastern plants do not seem worthy of recognition. 



While it is not my intention in this paper to consider all the 

 Pacific Coast species which are closely related to Carex stricta, I 

 have included Carex angustata and certain plants confused with it. 

 Carex angustata itself is distinguished from its eastern relatives by 

 the finely many-nerved perigynia. It seems to be exactly the same 

 plant afterwards described by Professor Bailey as Carex acutina 

 and is of rare occurrence in collections. It is a slender plant 

 with rather loosely cespitose culms and short ascending stolons. 

 The lowest bract does not exceed the inflorescence, the lower 

 sheaths are nearly if not entirely smooth, and the foliage is much 

 less rough than in its eastern relatives. 



More common in the same region is a much larger plant which 

 has often been distributed as Carex acutina Bailey. In it the 

 lowest bract much exceeds the inflorescence and the lower sheaths 

 are strongly hispidulous. This species seems not to have been 

 described and accordingly I am now proposing it as Carex egregia. 



The plants from the eastern parts of the Rocky Mountains 

 called Carex acutina seem to be either forms of Carex aquatilis 

 Wahl. {C. variabilis Bailey), having sharp pointed scales exceeding 

 the perigynia, or species closely related to it. They are but dis- 

 tantly related to the genuine Carex acutina. 



The species here treated are separable as follows: 



)osely cespitose; with short ascendini 



Perigynia broadly oval or suborbic 



maturity (eastern United States). 



Perigynia narrower, plano-convex, 



Washington). 



Lowest bract exceedec 



