147 



tried witli A\ NiUk 



Limited space prevents me from entering into details ; I shall, 

 therefore, merely state my conclusions. 



As in R. Nntkana^ and in fact, as in all the Eucinna^momex, 

 the spines, wliich are normally more or less curved, majTbecome 

 straight and slender and not infrequently ascending in the upper 

 part of the bush ; so in R. pisocarpa. 



To divide specimens in two sections, one with straight or as- 

 cending spines, and the other with stout recurved spines, would 



t _ 



indicate httle experience in observing the variabiHty of Roses. 

 Moreover this treatment has been 

 wisely discontinued. 



R. pisocarpa, in its varying forms is widely distributed, rang- 

 ing from New Nexico to ]>ritish America, possibly as far north as 

 Alaska (Crepin). It affects low wet locations, attaining a height 

 of lO to 12 ft. in such, but is much reduced when growing in 

 drier, less fertile ground. Fruit is usually small, ordinarily 

 clustered, rarely solitary; seeds small; dull white ; stipules short, 

 usually narrow; leaflets rather small, oblong-ovate to-obovate, 



r 



usually simply toothed; fascicles of adventitious branches are 

 quite common in the upper part of the bush, especially when re- 

 clining. 



R, Woodsii is closely related to R. pisocarpa. In fact many of 

 the specimens found in herbaria and so labelled are of this 

 species; others have a marked resemblance to R, blanda^ var. 

 Arkansana. As before stated, an occasional small lobe to the 

 outer sepals has little diagnostic value. It may be here remarked 

 that when two or more species grow together, especially if on the 

 limits of each, intermediate forms are common, apparently due 

 * either to the influence of a common environment or to hybridiza- 

 tion, or to both combined, 



Rosa Californica, Cham, and Schlecht. 1827 is badly de- 

 limited. M. Crepin speaks of it as a ** chaos veritable." The 

 material placed in my hands has been so little, and that little so 

 contradictory, that I have not reached any satisfactory conclusions 

 respecting it. I suspect, however, that one or two good species 

 will be found in the debris when it is thoroughly elaborated. It 

 is quite possible that variations of known species may figure 

 largely in this heterogeneous mass. 



