BOTANY FOR YOUNG PEOPLE. 165 



R. Villosus. Pubescent, hispid and prickly. 

 Leaves digitate in threes or lives, leaflets ovate, 

 acuminate, serrate and hairy both sides. Stem 

 and petioles prickly. Calyx, short, acuminate. 

 Petals lance ovate. 



SALVIA. Diandria Monogynia. Calyx tu- 

 bular, striated, two lipped. Cowl ringent. 

 Filaments fastened transversely to a pedicel. 



S. Officinalis. Leaves, lanceolate, ovate 

 notched. Flowers spiked. Calyx mucronate. 

 [Sage.] 



THYMUS. Didynamia Gymnospermia. Ca- 

 lyx, sub campanulate. Throat closed with 

 v illose hairs. Corol of the upper lip shorter. 



T. Vulgaris. Stems erect. Leaves, ovate, 

 re volute. Flowers whorl spiked. [Thyme.] 



ULMUS. Pentandria Digynia. Calyx some- 

 what bell form, generally five cleft, inferior, per- 

 manent. Corolla none. Capsules membrana- 

 ceous. flat, compressed, one seeded. 



U. Americana. Branches smooth. Leaves 

 oblique at base, serratures acuminate. Flow- 



