326 THE KINDS OF PLANTS 



A. graveolens, Linn. Celery, Biennial, smooth : leaflets 3-7, wedge- 

 shaped or obovate, the lower ones about 3-divided, round-toothed. Europe; 

 cultivated for its petioles, which have become greatly enlarged. 



4. CAEUM. Caraway. 



Slender and erect, smooth annual and biennial herbs with pinnate 

 leaves : flowers white or yellowish, in compound umbels provided with in- 

 volucres: axis bearing the carpels splitting in two at maturity. 



C. Carui, Linn. Caraway. Stem furrowed, 1-2 ft. : leaves cut into 

 thread-like divisions: flowers white. Europe. Cultivated for its fruits, 

 known as "Caraway seed," and also run wild. 



C. Petroselinum, Benth. Parsley. One to 3 ft. : leaflets ovate and 3-cleft, 

 often much cut or "curled" in the garden kinds: flowers yellowish. Europe. 



CO. GAMOPETALiE. 



XX. LABIAT^E. Mint Family. 



Herbs, usually of aromatic scent, with 4 -cornered stems and 

 opposite usually simple leaves: flowers typically 2-lipped: stamens 

 4 in 2 pairs, or only 2: ovary deeply 4-lobed, forming 4 indehiscent 

 nutlets in fruit. A well-marked family of some 2,700 species, dis- 

 tributed in about 150 genera, of both temperate and tropical regions. 

 To this family belong the various mints, as peppermint, spearmint, 

 catnip, hyssop, thyme, pennyroyal, savory, rosemary, sage, hore- 

 hound, balm, basil. Flowers mostly in whorls in the axils of leaves 

 or bracts, sometimes forming interrupted spikes. 



a. Stamens 2. 



b. Calyx about equally toothed, hairy within 1. Monarda 



bb. Calyx 2-lipped, naked within 2. Salvia 



aa. Stamens 4. 



b. Corolla scarcely 2-lipped 3. Mentha 



bb. Corolla strongly 2-lipped. 



c. Calyx 2-lipped 4. Brunella 



cc. Calyx nearly or quite regular. 



D. Upper or inner pair of stamens longer 5. Nepeta 



dd. Lower or outer pair longer. 



e. Tube of corolla including the stamens 0. Marrubium 



ee. Tube with stamens projecting 7. Leonurus 



1. MONARDA. Horse-mint. 



Rather stout, mostly perennials, with flowers in close terminal heads: 

 calyx tubular, 15-nerved, hairy in the throat, the teeth nearly equal: corolla 

 strongly 2-lipped, the upper lip erect, the lower spreading and 3-lobed. 



