Vol. III.] 



MINT FAMILY. 



77 



2. Teucrium occidentale A. Gray. 

 Hairy Germander. (Fig. 3071.) 



Teucrium occidentale A. Gray, Syn. Fl. 2: Part i, 349. 



1878. 



Perennial, villous or pubescent; stem erect, 

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

 the branches ascendiug. Leaves lanceolate or 

 ovate-lauceolate, thin, acute or acuminate at the 

 apex, sharply dentate, mostly rounded at the 

 base, usually sleuder-petioled, i / ~3^ / long, y^- 

 ly^' wide; spikes dense, becoming 3 / -8 / 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 Michx. Fl. Bor. Am. 2: 3. pi. 30. 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, 

 10-nerved, nearly equally 5-toothed, the teeth lanceolate. Corolla-tube not longer than the 

 calyx, 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.] 



A monotypic genus of eastern North America. 



i. Isanthus brachiatus(X.) B.S.P. 

 False Pennyroyal. (Fig. 3072.) 



Trichostema brachiatum L. Sp. PI. 598. 1753. 

 Isanthus coeruleus Michx. Fl. Bor. Am. 2: 4. 



pi. jo. 1803. 

 /. brachiatus'&.S.V. Prel. Cat. N. Y. 44. 1888. 



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, 2 // -6 // 

 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 // -3 // 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 dense cymes. Calyx campanulate, 

 very 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 2-cleft 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. dichotomum. 



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



