122 Brassicaceae 



Leaves soft in texture, usually deeply pin- 

 natifid with 2-several pairs of linear to 

 obovate, obtuse segments. Stems several, 

 1-6 inches high, racemes at first dense 

 and corymbose, becoming elongated in fruit. 

 Flowers white with exserted broad rounded 

 petals | of an inch or more long; pods 

 usually lanceolate, tapering to each end. 



On alpine summits through the Rockies; 

 not common; flowering in June and July. 



Erect, 2-4 feet high,freely branch- 

 Sipymbrium 



altissimum in g smooth or nearly so. Lower 

 L. Tall leaves runcinate-pinnatifid, peti- 



Hedge oled, the lobes lanceolate, often 



auriculate; upper leaves smaller, 

 short petioled, or usually sessile, very deeply 

 pinnatifid, the lobes linear or lanceolate, 

 dentate or entire, the uppermost often re- 

 duced to linear, entire bracts. Flowers pale 

 yellow, J of an inch broad on slender spread- 

 ing pedicels, pods very narrowly linear, 

 divergent, 2-4 inches long. 



At the lower elevations throughout the 



