HEDEOMA PULEGIOIDES. 
Fruir. One—four hard nuts or achenia. 
Seeps. Erect, with little or no albumen. Embryo erect. Co- 
tyledons flat. : 
THE SECONDARY CHARACTERS. 
Hepeoma. Calyx gibbous beneath at base, thirteen-ribbed, 
throat hairy, upper lip of Corolla erect, flat, lower lip spreading, 
three-lobed. Stamens two, fertile, ascending. 
Calyx two-lipped, gibbose at the base, upper lip with three lanceolate teeth ; lower 
lip with two subulate ones. Coral ringent. Two short Stamens barren. 
THE SPECIFIC CHARACTERS. 
Heproma Puteciowes. Leaves oblong, few-toothed Flowers 
axillary, whorled. 
Pubescent, Leaves oblong, serrate. Peduncles axillary, whorled. 
THE ARTIFICIAL CHARACTERS. 
Cuass Dipynamia. Stamens four, two of them longer than 
the other two. Orprer Gymnospermia. Seeds naked. <Achenia 
four (or fewer), included in the calyx. Corolla monopetalous 
and labiate. 
NATURAL HISTORY. 
The species comprising this genus Heproma, which are mostly 
_ North American plants, were included by Linnzus and other 
botanists in Cunila and Melissa, but were distinguished, sepa- 
. rated and named by Persoon, and they constitute a small, but 
well-marked group. 
_ The Hepzoma Pursciomes notwithstanding, is yet commonly 
blended, even by some medical writers, with the Menrua Puie- 
 -@tum, which’ belongs to a different genus, and does not grow in 
America, The shape, smell, and properties are somewhat similar, 
__ whence the same vulgar name ; sey the American cod appears 
ao to be most efficient. 
_ Heproma Soran the American Pennyroyal, is ey. 
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