METCALF: NOTES ON NORTH DAKOTA PLANTS 



189 



notes more valuable than if based on the less complete and out- 

 of-date flora of Bolley & Waldron.^ 



Eighteen species were observed by us that have not previously 

 been reported in the state. 



Amphicarpa Pitcheri Torrey & 



Gray 

 Carex riparia W. Curtis 

 Carex scirpoides Schkuhr 

 Chenopodium humile Hooker 

 Cornus Amomum Miller 

 J uncus alpinus Villars 

 Cyperus diandrus Torrey 

 Erigeron annuus (L.) Persoon 



Najas marina L. 



Potamogeton praelongus Wulfen 



Prunus Besseyi Bailey 



Prunus serotina Ehrhart 



Rumex Brittannica L. 



Salix prinoides Pursh 



Scirpus nevadensis Watson 



Sparganium americanunt Nuttall 



Suaeda linearis (Ell) Moquin- 



Tandon 

 Utricularia minor L. 



The majority of these plants are from stations that fall well 

 within the range of manuals covering the region, from which 

 they have been omitted partly by mistake and partly from the lack 

 of intensive work throughout the state. Erigeron annuus E., 

 Carex riparia W. Curtis, and C. scirpoides Schkuhr are exception- 

 ally good examples of this occurrence. Others of the plants 

 listed were found on the extreme western border of their known 

 general range, as Cyperus diandrus Torrey and Juncus alpinus 

 Villars. By far the most interesting of all, however, were the 

 plants whose known range previously did not extend into North 

 Dakota. 



Western plants extending 



eastward 

 Scirpus nevadensis Watson 



Eastern plants extending 



westward 

 Amphicarpa Pitcheri Torrey & 



Gray 

 Cornus Amomum Miller 

 Najas marina L. 

 Rumex Brittannica L. 

 Sparganium americanum Nuttall 

 Suaeda linearis (Ell) Moquin-Tandon 



No striking northern or southern extensions were recorded. 

 Of the eastern group, four out of six are known to occur west- 

 ward to Minnesota or South Dakota and rarely (in one case) 



2 Boi^LEY, H. L., and Waldron, L. R. Preliminary list of seed-bearing plants 

 of North Dakota. North Dakota Agric. Coll. Exp. Station, Bull. 46. 1900. 



