Brassicaceae 123 



region as a weed, especially on the line of the 

 railway, flowering in July. 



Stems 1-2 feet high, sparingly 

 Sophia 

 intermedia greyish-puberulent, especially be- 



Rydb. low, or sometimes nearly smooth, 



Western often glandular above; hairs 



more or less stellate. Leaves 



Mustard. 



twice or thnce-pmnatind, the 

 primary divisions oblanceolate or obovate, 

 divided to near the midrib into linear or 

 linear-oblong segments, sparingly puberulent. 

 Raceme rather long, flowers small, less than 

 I of an inch high; petals yellow; peduncles 

 diverging sometimes nearly at right angles; 

 pod club-shaped. 



Common throughout the Rockies in open 

 places at the lower altitudes, flowering, in 

 June and July. 



Braya Erect 4-10 inches high, branch- 



humihs - n g below, sparingly hairy. 



Leaves spatulate or oblanceo- 



Robmson. 



Northern late, the lower obtuse, 1-2 inches 



Rock-cress. long, narrowed into a petiole, 



