46. 



Smooth, occasionally, however, pubescent, twining around sup- 

 ports or trailing. Leaves triangular, halberd or arrow-shaped, 

 the tip acute, or pointed, the basal lobes obliquely truncate or 

 sinuate lobed. The flowering peduncles four angled with two 

 leaf -like bracts which are commonly acute. Corolla is white or 

 tinged with rose purple. 



Small Ragweed (.Ambrosia artemisiaetolia) . With deeply divided leaves 

 and branches with flowers. 1 head with staminate flowers, 2 pistillate 

 flower containing the "seed." (U. S. Dept. Agr.) 



MINT FAMILY (Labiatae.} 



A number of troublesome weeds like the catnip, common ger- 

 mander or wood sage, and peppermint, with creeping " roots"; of 

 the cultivated species the scarlet sage, peppermint, hyssop, etc. 

 Many of the plants have a pungent flavor, and square stem, and 

 thus are easily recognized. 



