Polygonaceae 77 



out the region in moist grounds and beside 

 streams, flowering in June. 



Rumex Stems a foot or more high, 



acetosa smooth. Leaves oblong, hastate 



Sour. or ovate-sagittate, 1-4 inches 



long, acute, the basal few and long petioled, 

 stem leaves sessile, the acute auricles entire. 

 Flowers, dioecious, minute, crowded in a slen- 

 der head 3-6 inches long, yellowish-green 

 tinged with red. 



In moist open ground at the higher ele- 

 vations, more or less frequent throughout 

 the Rockies, flowering in midsummer. 



Smooth, pale green, erect, and 

 saiicifiolus spreading, 1-3 feet high. Leaves 

 Weinm. lanceolate, acute or acuminate 



Pale-leaved t . ., 



^ . at both ends, petioled. Flowers 



Dock. 



small greenish-white in erect or 

 reflexed racemes, dense in fruit, interrupted 

 below; wings of the fruit triangular-ovate, 

 with a large ovoid tubercle. 



Frequent throughout the Rockies at the 

 lower altitudes; flowering in summer. 



