54 MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



common in the state and appear to intergrade in many localities. A 

 subalpine form of Mcurjicsii, growing in loose limestone shingle on 

 Mt. Bridger (8500 ft.), has long ligneous roots like bioolor, but other- 

 wise agrees well with Mensiesii. 



Delphinium diversicolor, Rydberg, Bull. Torr. Bot. Club, 29:149. 

 "Rattlesnake Creek, Beaverhead Co., 1887, F. Tweedy, 34." 



Delphinium elongatum, Rydberg, Bull. Torr. Bot. Club, 29:148. 

 Nearest D. glaucum, Wats. "Lima, 1895, Rydberg." 



Delphinium glaucescens, Rydberg and var. uiulticaulc, Ryd- 

 berg, Flora, 157. These appear to be a form of D. occi- 

 dentale, Wats. (D. scopulorutn sitbalpiiiuin. Gray), tending 

 apparently toward D. scopulontin, Gray in its small 

 flowers, pubescent ovaries and more dissected leaves. D. occidentale. 

 Wats, is not "glandular," but viscid pubescent along the inflores- 

 cence and Nelson's form of subalpinum differs from Watson's type 

 of occidental, chiefly in the smaller size and larger, deep-blue sepals, 

 Watson's type of occidentale being a larger, branching plant with 

 paler flowers, evidently tending toward D. glaucum, W r ats. None of 

 the specimens under the variety subalpinum in the Gray Herbarium 

 have glandular pubescence. 



Delphinium Nuttallii, Gray. In alpine and subalpine situations. 

 Camp below Sperry Glacier, 6000 ft., Sept. I, 1903; Little St. Mary's 

 Lakes, Sept. i, 1903* L. M. Umbach ; Hall's Peak, Mission Range, 

 July 20, 1902, M. J. Elrod ; Plains, June 6, 1902. 



Delphinium occidentale, Wats. See D. glaucescens, Rydberg 

 above. 



Delphinium pauciflorum, "Nutt. Common on dry wooded upland 

 benches along the lower Clark's Fork. Plains and Thompson 

 Falls, June 27, 1902'. 



Delphinium pauciflorum depauperatum, Gray. In alpine situ- 

 ations. Mary Baker Lake, Sperry Glacier, 8000 ft., Aug. 22, 1901, 

 L. M. Umbach. I am inclined to regard this as a variety of D. Nut- 

 tallii, Gray, as it more nearly approaches it in habitat and will proba- 

 bly be found to intergrade with it. In this state, at least, D. pauci- 

 florum, Nutt. is a species of the lower forests westward and appar- 

 ently occurs nowhere in this immediate vicinity, yet in the finely dis- 

 sected leaves and small follicles the variety more nearly resembles 

 pauciflorum with which it has been placed. 



