78 
DIDYNAMIA eYMNOSPERJIIA. 
latis, serratis, acumi- 
natis; verticillis sex— 
floris;calycibus pubes- 
centissimis. 
Sp. pi. 3. p. 100. 
S. Annua Walt. 161. 
ceolate, serrate, acu- 
minate; whorls 6-flow- 
i ered; calyx very pu- 
| bescent, 
Stem 1 8 to 24 inches, angled, nearly glabrous, sprinkled with a few 
hairs, particularly at the summit and near the joints. 
MARRUBIUM. Gen. Pl. 976 
Calyx hypocrateri- 
formis, rigidus, 10- 
striatus. Corollce la- 
bium superius bifi- 
dum, lineare, rectum. 
!. VULGARE. 
M. foliis subrotun- 
do-ovatis,dentatis, ru- 
goso-venosis; calyci- 
bus dentibus setaceis, 
uncinatis. 
Calyx hypocratei i- 
form, rigid, 10-streak- 
ed. Upper lip of the 
corolla 2-cleft, linear* 
straight. 
Leaves ovate, near- 
ly round, toothed, ru- 
gose ; teeth of the ca- 
lyx setaceous, hooked. 
Sp.pl. 3. Ill, Pursh % 403. 
A perennial plant, growing in dense tufts. Stems about a foot high ? 
branching at base, square, with the whole plant lomentose and hoary. 
Z>e cives very rugose, attenuated at base into petioles about half an inch 
long. Flowers in axillary whorls, veiy numerous. Teeth of the calyx 
acute, and somewhat spinous. Corolla small, white, lower lip 3-lobed. 
Stamens and styles shorter than the corolla. 
This plant though originally a foreign one, is now naturalized. It 
grows very common about buildings in dry soils. Flo\vers during the 
greater part of the summer. 
LEONURUS. 
Calyx 5-gonus, 5- 
dentatus. Corollce la- 
bium superius vilio- 
Calyx 5 -angled, 5- 
toothed. Upper lip 
of the corolla villous, 
