86 
D1DYNAM1A GYMN0SPERM1A. 
4. Obovatdm. E. 
D. spicis brevibus; 
foliis sessilibus, cune- 
ato-obovatis, superne 
dentatis; bracteis mi- 
nimis, ovatis, acumi- 
natis. E. 
Spikes short; leaves 
sessile, cuneate, obo- 
vate, toothed near the 
summit; bracteas ve- 
ry small, ovate, acu- 
minate. 
Stem about 15 inches high, square, glabrous, pubescent at the summit. 
heaves about an inch and a half long, semiamplexicaule at base, strongly 
tooothed towards the summit. Floivers opposite, not crowded in the 
spike. Bracteas smaller than in any of the preceding species, with the 
calyx pubescent, teeth of the calyx nearly equal. Corolla pubescent. 
If my specimen gives a fair exhibition of this species, it is, when com- 
pared with the preceding species, a smaller plant, with the corolla less in- 
flated. Can this have been the original D. denticulatum of Aiton ? Col- 
lected near St. Mary ? s Georgia by Dr. Baldwin. 
'Flowers May— -July. 
MACBR1DEA. E. 
Calyx subturbina- 
tus, trifidus; laciniis 
duabus majoribus. 
Corolla bilabiata, la- 
bio superiore integro, 
inferiore tripartite. 
Anther 02 bilobae.lobis 
divaricatis, spinoso 
ciliatis. 
Calyx turbinate, 3- 
cleft, with 2 segments 
large. Corolla two 
lipped, the upper en- 
tire, the lower 3-part- 
ed. Anthers 2-lobed, 
the lobes divaricate, 
fringed with small 
spinel. 
1. Pclchra. Nutt. 2. p. 36. 
Thymbra caroliniana. Walt. p. 162. 
Root perennial, creeping. Stem herbaceous, erect, simple, 12 to 18 
inches high, square, glabrous, a little hairy at the joints. Leaves oppo- 
site, lanceolate, acute, serrulate, dotted, ciiiate, glabrous underneath, a 
little hairy on the upper surface, the upper ones sessile, the lower attenu- 
ated at base as if on petioles about half an inch long. Flowers verticil 
