FOUR NEW POTENTILLACEAE. 137 



Spreading limb. Stamens 6, short, nearly equal ; filaments 

 stoutly subulate ; anthers small, ovate, acute. Ovary linear; 

 stigma depressed and sessile. Siliques linear, straight, narrow, 

 only moderately compressed ; valves with strong midnerve ; 

 seeds in one row, not strongly flattened, oval-oblong, wingless. 



S. Whitedii. C. V. Piper nnder Aradzs, This cruciferous 

 type of the Northwest, seen in flower only would be taken for 

 a member of the genus Lescuriella, several whitish-flowered or 

 pinkish species of which are very much like this in all except 

 their pods. But in Sandbergia the pods are really linear 

 even narrowly linear — siliques ; but it does not at all follow 

 from this that the plant is an Arabis, There are plenty of 

 genera, Arabis ^ Sisymbrium, Erysimum. , Stenophragm.a and 

 many others into which pods like these are easily admissible ; 

 while the flowers of the present type are as far from those of 

 any Arabis as can be well imagined. I am constrained by its 

 floral characters, together with its completely vesicariaceous 

 habit and indument to propose for it the rank of a genus, 

 and I willingly dedicate it to him who first collected it, Dr. 

 J. A. Sandberg, whose name is already widely known as a 

 collector. 



Four New Potentillaceae. 



PoTENTiLLAVALLicoLA. Stout and short branched caudex 

 surmounting a thick subligneous root : stems slightly decum- 

 bent, a foot high or more, almost naked above the base, ter- 

 minating in a rather contracted cyme, both stem and lower 

 face of all leaves silvery-tomentulose. but upper face darker, 

 yet canescent with a very thin coat of short silky hairs : basal 

 leaves about 4 inches long, not depressed, the petiole and leafy 

 rachis about equal as to length ; leaflets 7 to 9, closely approxi- 

 mate, 1 to 1^ inches long, oblong in outline, deeply and 

 incisely serrate, the upper pairs decurrent on the rachis: 

 corolla not seen ; mature calyx villous with long white hairs, 



