SUPPLEMENT TO THE FLORA OF MONTANA. 77 



Miles City, May 26, 1902; Custer Station, May 25, 1890; Lombard, 

 June i, 1901, the latter connecting with L. Rydbcrgii. 



Lupinus caespitosus, Nutt. In dry gravelly situations. West 

 Gallatin River W. of Bozeman, June 3, 1900; Head of Cottonwood 

 Cr., Tobacco Root Range, 9000 ft., Aug. 10, 1902. 



Lupinus candicans, Rydberg, Bull. Torr. Bot. Club, 28:35. 

 "E. V. Wilcox, 1900, 451; Boulder, 125 & 129 in part; Big Tim- 

 ber, 385; R. S. Williams, Highwood Mts., 42; Columbia Falls, 1897.'* 



Lupinus cyaneus, Rydberg, Bull. Torr. Bot. Club, 28:35. Com- 

 mon in the lower canyons and mountain forests, 5-7000 ft., with 

 L. pseudoparviflorus, Rydb. 



Bridger Cr., July 25, 1902; Porcupine Cr., Crazy Mts., July 18, 

 1902; Limekiln Canyon, Bozeman, July 27, 1901; Bridger Canyon, 

 July 25, 1902. 



Lupinus decumbcns, Torr., Rydberg, Flora, 231. Torrey's de- 

 scription is insufficient to separate this from L. argcnteus, Pursh., 

 which varies greatly in laxity of spike, abundance of leaves and 

 size of flower and I agree with Britton & Brown (111. Fl. 2: 296) 

 in reducing decumbcns to a synonym. 



Lupinus flavescens, Rydberg, Bull. Torr. Bot. Club, 29:245; 

 L. sulphurcus, Dougl. in part. ''Medicine Clay Prairies," Wyeth." 

 Doubtfully in Montana ; probably in Washington or Idaho. 



Lupinus flexuosus, Lindl. ; Agardh, Syn. 34; L. s>:'iceus, Ryd- 

 berg, Flora, 230 and recent authors. This is the most common 

 lupine on the dry plains and uplands of Montana and has usually 

 been confused with L. sericeus, Pursh., which is characterized by its 

 coarsely villous and subsilky, spreading pubescence, while 

 L. flexuosus has pubescence short, silky and appressed, as with our 

 species. It is more difficult to separate L. flexuosus from L. ornatus 

 Dougl., but in general the latter has leaves fewer and more scatter- 

 ed, leaflets larger and flat, pubescence short silky appressed, raceme 

 longer, denser and more acuminate, verticels often 6-flowered, flow- 

 ers larger (14-16 mm.) and standard less pubescent. L. flexuosus 

 is characterized by its densely leafy stems, leaflets smaller, often 

 conduplicate, less silky, subvillous and appressed, rarely somewhat 

 spreading pubescence, shorter and more abrupt raceme, with flowers 

 more scattered and smaller (10 mm.) bracts and pedicels longer and 

 more densely pubescent standard. The former appears to be found 

 mainly west of the Divide, where the two seem to intergrade and 



