AND RELATED SpECIES 584 



distinctness from D. caiuponim is not so clear. The principal char- 

 acter used by Prof. Greene in order to distinguish the latter from 



D. Carolinianum, viz., the erect spur, does not hold, for D. Caro- 

 linianum sometimes has an erect spur ; a'lso D. albescens, as 

 shown in Dr. Houghton's specimens from Lake Winnipeg. 

 These were included by Greene in D. caiiiponim, but are 

 very unlike the plant from Texas, New Mexico and Arizona, 

 which must be taken for the type of D. cauiponim. Houghton's 

 plant differs in no respect, except the erect spur, from the common 

 Larkspur of the Prairie Region. The specimens from Arkansas 

 cited below are more slender and have narrower leaf-segments than 

 is usual. The following specimens of D. albescens are found in the 

 herbaria of the New York Botanical Garden and Columbia Uni- 

 versity. 



Manitoba : Lake Winnipeg, Dr. Houghton. 



Minnesota: Hennepin Co., \^go,J. H. Sandberg ; Fort Snell- 

 ing, 1889, E. A. Mearns. 



South Dakota : Scalp Creek (collector not given). 



Nebraska: Lincoln, 1887, H.J. Webber (type) ; Crete, 188 1, 

 G. D. Sivcezey. 



Kansas: Ft. Riley, 1892, E. E. Gayle, 484; Atchison, 1892, 



E. B. Knerr ; Riley Co., 1895, / B. Norton, 8 ; Topeka, 1891, 

 B. B. Smyth; Manhattan, 1889, W. A. Kellerman. 



Colorado: Ft. Collins, 1896, C. F. Baker. 

 Arkansas : Dr. Pitcher. 



Indian Territory: Sapulpa, 1895, B. F. Bush, logi. 

 Texas: San Antonio, 1894, A. A. Heller, ij8j. 

 Missouri : Eagle Rock, 1898, B. F. Bush, 228 ; Independence, 

 1894, 7. 



Illinois : Augusta, 5. B. Mead. 



3. Delphinium camporum Greene, Erythea, 2 : 183 

 This species is closely related to the preceding, but is generally 

 lower and stouter, with numerous basal leaves and {ew stem-leaves ; 

 the lower pedicels are much elongated, often 5 cm. long; the pedicels 

 as a rule are strongly curved at the end, bringing the spur into 

 an erect position. The flowers are similar to those of the preced- 

 ing, but generally more purely white, and the lobes of the some- 



