n8 Brassicaceae 



smaller. Flowers about J an inch broad, 

 light yellow in a close raceme, 2-5 inches 

 long in fruit; pods much inflated and vari- 

 able, often | an inch thick. 



In dry clayey and stony soil and on slopes 

 throughout the Rockies; flowering in June. 



Smooth or rarely with a few 



scattered hairs; stems erect, 

 pennsylva- 



nica Muhl. stout or slender, 8 inches to 3 



Pennsyl- feet high , usually much branched , 



vama somewhat succulent, leafy up 



to the racemes. Basal leaves 



cress. 



2-6 inches long, the terminal 

 leaflet obovate, ovate or obcordate, usually 

 narrowed at the base, J-f of an inch wide, 

 the lateral 4-8 pairs oblong, oval or obovate, 

 all toothed or some of them entire. Flowers 

 about J of an inch broad, white; pods very 

 narrowly linear, J-i} inches long, erect when 

 mature on ascending pedicels. 



In wet shaded places, sparingly through- 

 out the region; flowering during June and 



July. 



