Vol. in.] 



MINT FAMILY. 



77 



2. Teucrium occidentale A. Gray. 

 Hairy Germander. (Fig. 3071.) 



Teucrium cccidenlale A. Gray, S5'n. Fl. 2: Part i, 349. 



1878. 



Perennial, villous or pubescent; stem erect, 

 rather stout, usually much branched, i°-3° high, 

 the branches ascending. Leaves lanceolate or 

 ovate-lanceolate, thin, acute or acuminate at the 

 apex, sharply dentate, mostly rounded at the 

 base, usually slender-petioled, i'-3K' lougi Vt'- 

 iji' wide; spikes dense, becoming 3'-S' long in 

 fruit; bracts lanceolate-subulate or the lower some- 

 times larger; calyx and axis of the spike villous- 

 pubescent, the 3 upper calyx-teeth acute or acutish; 

 corolla 4"-6" long. 



In moist soil, Ontario to eastern Pennsylvania, Wis- 

 consin, Nebraska, New Mexico and California. Appa- 

 rently intergrades with the preceding species. July- 

 Sept. 



3. ISANTHUS Micbx. Fl. Bor. Am. 2: 3. p/. jo. 1803. 



An annual erect finely viscid-pubescent much-branched herb, with narrow entire or few- 

 toothed leaves, and small blue flowers in loose axillary cymes. Calyx broadly campanulate, 

 lo-nerved, nearly equally 5-toothcd, the teeth lanceolate. Corolla-tube not longer than the 

 calvx, enlarged into the throat, the limb nearly equally 5-cleft into obovate somewhat spread- 

 ing lobes. Stamens 4, didynamous, incurved-ascending, not longer than the corolla, the 

 anterior pair slightly the longer; anther-sacs divergent at maturity. Ovary deeply 4-lobed; 

 style minutely 2-cleft at the summit. Nutlets rugose-reticulated. [Greek, equal-flower, the 

 corolla-lobes being nearly equal.] 



.\'monotypic genus of eastern North America. 



I. IsanthusbrachiatusfL.) B.S.P. 

 False Pennyroyal. (Fig. 3072.) 



Ti'ichnslema brachiatiim L. Sp. PI. 598. 1753. 

 Isanllius cocritleus Michx. Fl. Bor. Am. 2; 4. 



pi. to. 1801. 

 /. brachiatfs B.S.P. Prel. Cat. N. Y. 44. 1SS8. 



Stem slender, much branched, 6'-2o' 

 tall, the branches spreading. Leaves ob- 

 long or elliptic-lanceolate, acute at each 

 end, entire, or with a few sharp teeth, 

 3-nerved, short-petioled,i'-2'long, i"-i>" 

 wide; axillary cymes 1-3-flowered; pedi- 

 cels very slender, some of them as long 

 as the fruiting calyx; calyx-lobes acute or 

 acuminate, longer than or equalling the 

 tube; corolla 2"-^" long, the fruiting 

 calyx 3" long. 



In sandy soil, especially along streams, • 

 Quebec and Ontario to Minnesota, south to 

 Georgia and Texas. July-Sept. 



4. TRICHOSTEMA L. Sp. PI. 598. 1753. 



.Annual or perennial erect branching herbs, some western species shrubby, with lanceo- 

 late oblong or linear entire or slightly repand leaves. Flowers small, or middle-sized, pink, 

 blue, purple, or white, paniculate, or in axillary loose or dcuse cymes. Calyx campanulate, 

 verj' unequally 5-lobed in our species, the lobes ovate or lanceolate. Corolla-tube slender, 

 exserted or included, the limb somewhat oblique and deeply 5-cleft into oblong more or less 

 declined segments. Stamens 4, didynamous, ascending, curved, the anterior pair the longer, 

 the filaments filiform, spirally coiled in the bud, long-exserted; anther-sacs divaricate, more 

 or less confluent at the base. Ovary deeply 4-lobed; style 2cleft at the summit. Nutlets 

 obovoid, reticulated. [Greek, hair-stamen, referring to the slender filaments.] 



About 8 species, natives of North America. 

 Leaves oblong or lanceolate ; plant minutely viscid-pubescent. i. T. dhholoviuni. 



Leaves linear; plant puberulent or glabrous. 2. T. lineare. 



