LABIATAE. Vor. II. 
6. Teucrium bétrys L. Cut-leaved Annual Ger- 
mander. Fig. 3571. 
Teucrium botrys L. Sp. Pl. 562. 1753. 
Annual, villous-pubescent, branched, 1° 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. : 
wy Vee 
We iD 
Waste grounds, Massachusetts and Ohio. Naturalized 
from Europe. July-Sept. 
3. ISANTHUS Michx. FI. Bor. Am. 2: 3. 
pl. 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 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. 
1. Isanthus brachiatus (L.) B.S.P. 
False Pennyroyal. Fig. 3572. 
Trichostema brachiatum L. Sp. Pl. 598. 1753. 
Tsanthus coeruleus Michx. Fl. Bor. Am. 2: 4. 
pl. 30. 1803. 
I. brachiatus B.S.P. Prel. Cat. N. Y. 44. 1888. 
Stem slender, much branched, 6’-20’ tall, 
the branches spreading. Leaves oblong or 
elliptic-lanceolate, acute at each end, entire, 
or with a few sharp teeth, 3-nerved, short- 
petioled, 1’-2’ long, 2”-6” wide; axillary 
cymes I-3-flowered; pedicels very slender, 
some of themas 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. Pl. 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. . 1. T. dichotomum. 
Leaves linear ; plant puberulent or glabrous. 2. T. lineare. 
