50 MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



Polygonum prolificum, Robinson, Rhodora, 4: 68. In alkali 

 places. Lake Bowdoin near Malta, Aug. 25, 1903. 



Rumex confinis, Greene, Pittonia, 4: 306. (Wm. Trelease). 

 One of the segregates of R. occidentalis , Wats., differing from the true 

 Dccidentalis in being a much larger plant with larger leaves and much 

 larger fruit valves. Noted in but one locality in the state, growing 

 in ditches by the railway and may have been introduced from west- 

 ward, where it is more common. 



Libby Creek, Flathead Co., July 6, 1900. 



CHENOPODIACE^. 



Endolepis ovata, Rydberg, Bull. Torr. Bot. Club, 30: 248. 

 Separated from E. Suckleyana, Torr. "Glendive, 1892, J. H. Sandberg." 



AMARANTACE^:. 



*Amaranthus chlorostachys, Willd. A weed introduced from 

 westward. Columbia Falls, Sept. 9, 1899; Troy, July 25, 1900. 



NYTAGINACE^. 



Abronia nudata, Rydberg, Bull. Torr. Bot. Club, 29: 683. 

 "Colgate near Glendive, 1892, Sandberg, MacDougal & Heller, 1016." 



Allionia nyctaginea, Michx. In cultivated ground apparently 

 introduced. Calais, July 14, 1900; Wibaux, July 9, 1901. 



PORTULACACE^:. 



Claytonia multicaulis, A. Nelson, Bull. Torr. Bot. Club, 27:259; 

 C. Virginica, Rydberg, Flora, 138, and other authors as to the Rocky 

 Mountain species. This species differs from C. Virginica, L. in its 

 somewhat wider, sessile cauline leaves, white petals with a yellow 

 base within and anthers pink. Nelson describes it fairly well, ex- 

 cept the cauline leaves are not rarely above or below the middle of 

 the stem and the petals are not "white with pinkish or purplish 

 veins". The inflorescence is more racemiform than in C. lanceo- 

 lata, Pursh and peduncles are nodding before and after anthesis. 



Common in the mountain valleys from 4 to 7000 feet altitude and 

 intergrading above with C. lanceolata, Pursh (7-9000 feet). If this 

 prove distinct from Nelson's C. multicaulis, it may be ca-led 

 Clavionia tricolor. 



