LABIATAE. 



VOL. III. 



6. Teucrium botrys L. Cut-leaved Annual Ger- 

 mander. Fig. 3571. 



Teucrium botrys L. Sp. PI. 562. 1753. 



Annual, villous-pubescent, branched, i high or less. 

 Leaves slender-petioled, deeply pinnatifid into oblong, 

 entire or toothed lobes, the basal ones with petioles 

 longer than the blades; flowers whorled in the upper 

 axils; pedicels shorter than the calyx; calyx campanu- 

 late, gibbous, about 8" long in fruit, veiny, its teeth 

 triangular-ovate, acute, nearly equal; corolla purplish, 

 about 6" long. 



Waste grounds, Massachusetts and Ohio. Naturalized 

 from Europe. July-Sept. 



3. ISANTHUS Michx. Fl. Bor. Am. 2 : 3. 

 pi. 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, 10-nerved, nearly equally S-toothed, 

 the teeth lanceolate. Corolla-tube not longer than the 

 calyx, enlarged into the throat, the limb nearly equally 

 5-cleft into obovate somewhat spreading 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 (L.) B.S.P. 

 False Pennyroyal. Fig. 3572. 



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



r santhus coeruleus Michx. Fl. Bor. Am. 2 : 4. 



pi. 30. 1803. 



I. brachiatus B.S.P. Prel. Cat. N. Y, 44. 1888. 



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

 the branches spreading. Leaves oblong 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 i-3-flowered ; pedicels 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, Vermont, 

 Georgia, Kansas and Texas. Flux-weed. Blue 

 gentian. July-Sept. 



4. TRICHOSTEMA [Gronov.] L. 

 Sp. PI. 598. 1753. 



Annual or perennial erect branching herbs, some western species shrubby, with lanceolate 

 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, the 3 upper much longer than 

 the 2 lower. Corolla-tube slender, exserted or included, the limb somewhat oblique and 

 deeply 5-cleft into oblong more or less declined segments. Stamens 4, didynamous, ascend- 

 ing, 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 10 species, natives of North America. Type species: Trichostema dichotomum L. 

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



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



