D1DYNAM1A ANGI0SPERM1A. 
m 
tibus caiycis obiongis^ teeth of the calyx ob~ 
acuminatis. long, acuminate. 
Sp. pi. 3. p.360. Walt. p. 172. Mich. 2.p. 23. Pursh. 2. p. 426. 
Perennial. Stem erect, 4-angled. Leaves opposite, narrow, lanceo- 
late, slightly acuminate, serrate, sessile, semiamplexicaule, and with the 
whole plant glabrous. Flowers opposite, axillary near the summit of the 
stem, on peduncles nearly as long as the leaves. Calyx angled, the seg- 
ments subulate, long. Corolla pale blue, the tube rather longer than the 
calyx, the lower' lip larger than the upper, 3-lobed. Stamens very short, 
in the tube of the corolla. Style about as long as the stamens. Seeds, 
many in each cell, small, oval, attached to a central receptacle. 
Grows in damp soils in the middle and upper country of Carolina, 
Flower# July — September. 
2. Alatu*. 
M. erectus* glaber; 
foliis petiolatis, ovatis, 
acuminatis, serratis ; 
pedunculis axillaribus^ 
oppositis, flore brevi- 
oribus ; dentibus ca- 
iycis rotundatis mu- 
cronatis ; caule tetra- 
gono, alato. 
Sp. pi. 3. p. 361. Pursh 2. p. 426. 
Stem 1 — 2 feet high, square, slightly winged along the angles. Leaves 
broad, lanceolate, sometimes ovate lanceolate, serrate, when large almost 
dentate, like the whole plant glabrous, tapering at base to petioles half an 
inch long. T Floivers on peduncles about as long as the petioles. Teeth 
of the calyx acuminate mucronate. Corolla very similar to that of the 
preceding species, pale blue, tinged in the throat with the yellow. 
These two species have many points of resemblance, the former can be 
distinguished by its sessile leaves, long peduncles, and larger corolla. This 
by its larger leaves and stem more distinctly winged. 
Grows in the flat pine barrens of Carolina. 
Flowers August — -September. 
Erect, glabrous j 
leaves petiolate, o- 
vate, acuminate, ser- 
rate ; peduncles axil- 
lary, opposite, shorter 
than the flower; teeth 
of the calyx round, 
mucronate ; stem 4- 
angled, winged. 
