310 



EXPERIMENT STATION BULLETIN. 



Fig. 38 (29). 



Tall Sorrel. Sour Dock. Rumex Acetosa L. An erect, sour, smooth, dioecious 

 perennial, 30-90 cm. high; spreading by rootstocks, leaves oblong, arrow-shaped, 2-10 

 cm. long; racemes erect, crowded or interrupted, calyx green, winged in fruit, orbicular, 

 heart-shaped, 3.5-4.5 mm. long. Sparingly naturalized from Europe. 



