CLASSIFICATION OF ANGIOSPERMS. 



677 



FlG. 371. American Pennyroyal (Hedeoma pulegioides), a low, annual plant, growing 

 in dry soil; having small, opposite, elliptical leaves; and loose clusters of bilabiate flowers, 

 often forming terminal leafy racemes. Bureau of Plant Industry, U. S. Department of 

 Agriculture. 



Thymus vulgaris (garden thyme) is a small shrub having 

 linear or linear-lanceolate leaves, and pale blue flowers with 



