250 CLASS XIV. ORDER I. 



This well known mint spreads rapidly by its creeping roots 

 in moist places. Stems erect, smooth, acute-angled. Leaves 

 sessile, lanceolate, acute, serrate, smooth. Spikes long, acute, 

 consisting of distinct, remote whorls. Pedicels glabrous. Flow- 

 ers purple. The whole plant has a pleasant, aromatic flavor, 

 well known. — Flowers in August. — Perennial. 



255. HYSSOPUS. 



Hyssopus nepetoides. L. Tall Hyssop. 



Spikes formed of wlioils, cylindrical, leaves siibcor- 

 date, ovate, dentate, acuminate. 



One of our tallest labiate plants. Stem large, square, smooth, 

 three to six feet high. Leaves opposite, with large teeth. Co- 

 rollas small, pale purple, Avith exserted stamens and styles. — 

 Woods, Chelsea beach island. — July. — Perennial. The charac- 

 ters of H. scrophularifoUus and H. nrpefoides are blended in this 

 plant; and I am convinced, with Mr. Eaton, that they are pro- 

 bably varieties. 



256. TEUCRIUM. 



Teucrium Canadense. Wild Germander. 



Stem herbaceous, erect ; leaves lanceolate serrate, 

 whitish underneath ; spike crowded, many flowered, 

 long. Mich. 



Stem erect, square, downy, a foot or more in height. Leaves 

 opposite, soft with fine down, lanceolate, acute, serrate. Spike 

 formed of small whorls of flowers, furnished with short bractes. 

 Calyx downy, its segments rather blunt. Corolla pale red, the 

 stamens issuing from a fissure in the upper side. — Eoad side, 

 Cambridgeport. — July. — Perennial. 



257. LAMIUM. 



Lamium amplexicaule. L. Hcnhit. 



Floral leaves sessile, clasping, obtuse. 



Not larger than Glechoma hederacea. Leaves opposite, 

 roundish, heart shaped or reniform, crenate and cut, the upper 

 ones clasping. Calyx hairy. Corolla red, or white. — Natural- 

 ized in cultivated ground. — May. — Annual. 



