138 THE AMERICAN BOTANIST 



wood yields a good yellow dye. Leaves are a favorite food of 

 the silkworm. 



Morns rubra. Red Mulberry. Fruit valued for pies. 

 Leaves used to feed silkworms. 



Urtica dioica. Nettle. Stems produce a serviceable 

 bast. Young tips used as a potherb. Probably other species 

 may be used as food. 



ARISTOLOCHIACEAE. 



Asaruin Canadcnsc. Canada Ginger. Rhizomes with a 

 ginger-like flavor, edible. 



POLYGONACEAE. 



Rumex crispus. Curled Dock. Leaves used as a pot- 

 herb. 



Rumex paticutia. Patience Dock. Leaves used like the 

 preceding. 



Rumex hymenosepalus. Canaigre. Stems used like the 

 cultivated rhubarb. Roots yield much tannin of commercial 

 value. 



Rumex acetosa. Sorrel. Leaves used as a salad. 



Polygonum sp. Smartweed. Several species of smart- 

 weed have numerous large seeds and it is likely that grains 

 little inferior to buckwheat might be developed from them. 



CHENOPODIACEAE. 



Chenopodium album. Pigweed. Young plants used as a 

 potherb. 



Chenopodium Calif or niewm. Soap Plant. Root sapona- 

 ceous. Seeds edible, used like the tropical quinoa. 



Chenopodium Fremouti. Seeds used like those of the pre- 

 ceding. 



Atriplex patula. Orach. Young plants used as a pot- 

 herb. 



