DIDYNAMIA ANGIOSPERMIA, 



125 



tibus calycis oblongis^ I teeth of the calyx ob- 



ficuminatis. 



long, acuminate. 



Sp. pi. 3. p. 360. Walt. p. 172. Mich. 2. p. 23. Piush. 2. p. 426. 



Perennial. Stem erect, 4-angled. Leaves opposite^ narrow, lanceo- 

 late^ slightly Pxuminatej serrate, sessile, scmiamplexicaule, and with the 

 whole plant glabrous- Flowers opposite, axillary near the summit of the 

 stem, v.n 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, 

 ia the tube of tlie 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. 

 Flowers July — September^ 



/ 



2. A 



LATUS. 



Erect, glabrous ; 



J 



o- 



M. erectus, glaber; 

 ibliis petiolatis, ovatis, I leaves petiolate 

 acummatis, serratis ; vate, acuminate, ser- 

 pedunculis axillaribus, rate ; peduncles axil- 

 oppositis, flore brevi- lary, opposite, shorter 

 oribus : dentibus ca- than the flower 5 teeth 



lycis rotundatis mu^ of the calyx round 

 cronatis : caule tetra- mucronate ; stem 4 



I 



gono, alato. 



angled, winged. 



Sp. pL 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. Flowers on peduncles about as long as the petioles. Teeth 

 of the calyx acumftiate 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 

 »3f its larger leaves and stem more distinctly winged. 



Grows in the flat pine barrens of Carolina. 

 Flowers August — September. 



^^ 



