D1DYNAM1A GYA1N0SPERMIA. 
75 
verticillis subquadri' 
fioris; calycibus gla- 
briusculis. 
rate; whorls generally 
4- flowered ; calyx gla- 
brous. 
Fursh 2. p. 407". 
S. arvensis Walter p. 1-62. 
Stem about 2 feet high, square, hispid along the angles, the bristles gen- 
erally retrorse. Leaves nearly sessile, very oblong, ovate, acute, serrulate 
rather than obtusely serrate, somewhat hispid on both surfaces. Calyx 
generally 4 in each whorl, the teeth prominent and very acute, their mar- 
gins and the angles of the calyx pubescent. Corolla larger than in our 
other species, rather longer than the stamens / yellowish purple. 
Grows in the wet pine barrens of Carolina. 
Flowers June — August. 
3. Aspera. 
S. caulibus ereetis, 
retrorsum hispidis; fo- 
lds lineari Ianceolatis, 
serratis, glabriusculis; 
verticillis subsexfloris, 
calycibus divarjcato- 
spinescentibus. 
Stems erect, retro- 
sely hispid ; leaves li- 
near lanceolate, ser- 
rate, nearly glabrous; 
whorls generally 6- 
flowered ; teeth of the 
calyx divaricate, spiny. 
Mich. 2. p. 5. Pursli 2. p. 407* 
I am uncertain whether I am not referring to the 3. Aspera of Mich- 
.aux a plant which may belong to another species. Stem 18 — 24 inches 
high, square, the angles fringed with retrorse bristles. Leaves long (2 — 3 
inches) very narrow, sessile, acute, finely serrulate, the margins fringed and 
the veins sprinkled with short acute bristles. Flowers generally 6 in a 
whorl. Teeth of the calyx very acute, somewhat divergent and with the 
angles fringed with short bristles. Corolla much longer than the calyx, 
.purplish Stamens as long as the corolla. 
Grows in the pine barrens of Carolina. 
Flowers June — August. 
4. Tenuifolia. 
5. caule erecto, an- j Stem erect, angled, 
gulato, sublaevi; foliis j nearly smooth; leaves 
petiolatis,ovali lanceo- I on petioles, oval-lan— 
