SUPPLEMENT TO THE FLORA OP MONTANA. 43 



CYPERACEAE. 



Carex arcta, Boott. (M. L. Fernald). Low meadowy 

 "Big Fork, Aug. 15, IQOI, L. M. Umbach, 220 ('01). 



Carex canescens subloliacea, Laestad. (M. L. Fernald), 

 Along sloughs, Lake McDonald, Aug. 20, 1901, L. M. Umbach. t 

 324 ('oi). 



Carex limosa, L. (M. L. Fernald). 

 Sloughs, Lake McDonald, Aug. 20, 1901, L. M. Umbach, 298 ('oi). 



Carex retrorsa, Scwein. (M. L. Fernald). 

 Big Fork, Aug. 9, 1901, L. M. Umbach, n ('oi). 



Cyperus erythrorhizos, Muhl. Columbia Falls, Irene M. Ken- 

 nedy, (1899?). 



Eleocharis palustris glaucescens, Gray. Bozeman, July 2, 1898. 

 A small, slender form with smaller akenes. Ours appear to have 

 the mature akenes sulphur yellow, instead of brown and the tuber- 

 cles more acute. 



Eleocharis palustris vigens, Bailey, Jour. N. Y. Mic. Soc. 5 : 

 104. "Culm stout, thick, very spongy, constricted at the summit, 

 nearly as thick as the ovate spike", which is nearly always pale, 

 not deeply colored as in the type. Savoy, July 18, 1900. A rather 

 low form. 



Eriophorum russeolum, Fries. In bogs about mountain ponds 

 and lakes. 



Columbia Falls, Aug. 20, 1896, R. S. Williams, 1063; Summit, 

 July 25, 1894, R. S. Williams; Lake McDonald, Aug. 30, 1903, L, 

 M. Umbach. 



Scirpus atrovirens pallidus, Britton, Trans. N. Y. Acad. Sci. g:i4, 

 Miles City, Aug. 16, 1903. 



Scirpus fluviatilis, Gray. Common in sloughs along the Mis- 

 souri in Valley Co. Box Elder Cr., July 14, 1901. 



(Scirpus Nevadensis, Wats.). Found north and south of Mon- 

 tana and should occur in this state. 



Scirpus rubrotinctus, Fernald, Rhodora, 2:20. Bozeman, July 

 14 1898; Mt. Bridger, Aug. 1903, Mrs. H. F. Henshall. Most of 

 the vS". microcarpus, Britton in Montana belongs here, though the 

 true S\ microcarpus has been found both north and south of this state 

 and doubtless occurs here also. 



