BUCKWHEAT FAMILY. Polygonaceee. 



A perennial species with broad-arrow- 

 Halberd-leaved, , , ,, , ., , ... 



Tearthumb head-shaped leaves, and a ridged reclining 



Polygonum stem beset with fine teeth curved back- 

 arifolium ward. Leaves long-stemmed, and prickle 



Pink, greenish ner ved. Insignificant pink or greenish 

 Se tember flower-clusters. In pulling up the weed 



the thumb and fingers are apt to be torn 

 with the saw-edged stems, hence the common name. 

 2-6 feet high. Common everywhere in wet soil. 



An annual species climbing over other 

 Tearthumb plants, with a weak four-angled reclining 

 Polygonum stem beset with prickles only at the 

 sagittatum angles ; the narrow-arrowhead-shaptd 



leaves, far apart, sometimes blunt-pointed, 

 September short stemmed, or the smaller leaves with- 



out stems. Flowers five-parted, pink, in 

 small dense clusters. Common in low, wet ground, 

 everywhere. 



A perfectly smooth species, with slender 



climbin S' reddi s h stem, arrowhead-shaped 

 Polygonum du- l eaves > an d leafy flower-spikes, the tiny 

 metorumv&r. flowers green-white or pink, the calyx 

 scandens five-parted. Climbing over rocks and 



pYnk n " White ' bushes 6 ~ 12 feet hi & h - In moist P laces > 



Ju , common every where. A rather decorative 



September vine but often troublesome in the vege- 



table garden. 

 The familiar buckwheat in cultivation 



escaped to waysides. From the old world ; 



esculenium with arrowhead-shaped leaves, and green- 

 Greenish ish white flowers sometimes pinkish, the 



white calyx five-divided, and with eight honey - 



SeTember glands alternating with the stamens ; the 

 flowers fertilized mostly by honeybees ; 

 the honey of a peculiarly fragrant character but dark in 

 color. Seed beechnut-shaped. Common everywhere. 

 The name fromfagus, beech, and TTU/KJS, wheat. 



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