MBTCALP: NOTES ON NORTH DAKOTA PLANTS 1 97 



1917); Moon (No. 217, Aug. 3, 1917, D. C. Mabbott) and Eckelson 

 (No. 291, August 8, 1917, D. C. Mabbott) Lakes, Barnes Co.; Addie 

 Lake, Griggs Co. ; Kellys Slough, Grand Forks Co. (No. 508, Sept. 20, 

 1917, D. C. Mabbott); Salt and Minto Lakes, Walsh Co. and Stump 

 Lake, Nelson Co. Bergman records this only from Eckelson and 

 Kulm. 



Ceratophyllum demersum Linnaeus. Common throughout the state, 

 in fresh water lakes and sloughs ; observed in nineteen counties. Speci- 

 mens collected from Wallace, S. 27-34 Lake, Kidder Co. (No. 302, 

 August 16, 1917), Clear Lake, Kidder Co. (No. 323, Aug. 17, 1917) 

 and King Slough near Bismarck, Burleigh Co. (No. 348, Aug. 24, 1917). 

 Bergman reports this plant from Lake Ibsen and St. John. 



Stanleya pinnata (Pursh) Britton. This plant has not been recorded 

 previously east of the Missouri River, the only record for the state being 

 along the extreme western border, namely, Medora, Billings Co., by 

 Bolley. Specimens were observed or collected from Jim Lake, Stuts- 

 man Co. (No. 324, Aug. 14, 1917, D. C. Mabbott); Jessie Lake, Griggs 

 Co.; Round, Brush, Doctor, Hester and Girard Lakes, McHenry Co. 

 In the vicinity of these lakes the plants were fairly common. The 

 first mentioned counties are far east of any other known locality and the 

 latter, McHenry Co., is somewhat farther north than previously re- 

 corded. 



Thely podium integrifolium (Nuttall) Endlicher. Local, only found 

 on the borders of the following alkaline lakes where it was exceedingly 

 abundant : Big Alkali Lake, southeast of Dawson, and Sink Lake, north 

 of Dawson, Kidder Co. (No. 221, Aug. 6, 191 7). It is interesting also 

 that the only previously known collection of this plant in the state was 

 near Dawson, by Bolley. One of the two records above is however, 

 slightly east and the other slightly farther north than that of Bolley 

 so that its northeastern range has been slightly extended. 



Primus Besseyi Bailey. Not previously recorded from the state, 

 which, however, comes within the general range of the plant as commonly 

 given. Found only along roadside, 20 miles S. E. of Bismarck, Burleigh 

 Co. (No. 327, Aug. 24, 1917). This plant was shown to the writer by 

 Dr. M. R. Gilmore, Curator, State Museum of North Dakota. He 

 stated that this was the only locality where he knew it east of the Missouri 

 River, but that he had observed it to be fairly common west of the 

 river. 



Prunus serotina Ehrhart. Not previously reported from the state; 

 observed only at Elsie Lake, Richland Co. 



Amphicarpa Pitcheri Torrey and Gray Not previously reported 

 from the state; range is extended westward as manuals give S. Dakota 

 as the extreme northwestern limit. Found along border of Mud Lake, 

 Richland Co. (No. 136, July 24, 1917) and in Riverside Marsh, South 

 of Mandan, Morton Co. (No. 382a, Aug. 27, 191 7). 



Opuntia fragilis Haworth. Found in sand hills near Lake George, 

 Drake, McHenry Co. Bergman reports this plant from vSvea and 

 Dickinson 



