WHITE 



to cure a disease peculiar to the South, known as break -bone 

 fever (Dengue), and it is without doubt from this property that 

 the name boneset was derived." 



ARROW-LEAVED TEAR-THUMB. 



Polygomim sagittatum. Buckwheat Family. 



Stem. Four-angled ; erect, or somewhat climbing by its prickles. 

 Leaves. Arrow-shaped; short-stemmed. FloTvers. White or pale pink; 

 small; clustered. Calyx. Usually five-parted; white or pale pink. Co- 

 rolla. None. Stamens. Usually eight. Pistil. One, with three styles. 

 Fruit. Sharply three-angled. 



This rather noticeable plant is common in low grounds, 

 bearing the name of ' l scratch-grass " in some places. 



HALBERD-LEAVED TEAR-THUMB. 



Polygonum arifolium. Buckwheat Family. 



This plant is distinguished from P. sagittatum by its taper- 

 pointed, long-stemmed leaves. 



WHITE SNAKEROOT. 



[PI. XLV 

 Eupatorium ageratoides. Composite Family. 



About three feet high. Stem. Smooth and branching. Leaves. Op- 

 posite ; long-stalked ; broadly ovate ; coarsely and sharply toothed. Flower- 

 heads. White ; clustered; composed of tubular blossoms. 



This species is less common but more beautiful and effective 

 than the boneset. It is found blossoming in the rich northern 

 woods of late summer. 



104 



