i6 DIANDRIA. MONOGYNIA, 
the length of the corolla, Stigma unequally 
bifid. Seeds 4, 
Flowers sometimes axillary, mostly in terminal dicho- 
tomous corymbs. Leaves opposite, punctate. Bractes in- 
conspicuous. : 
Specigs. 1. C. mariana. An American genus; growing’ 
chiefly in rocky, and, to the south, in mountainous situa> 
tions. The second species of this genus, the C. capitata ot 
Vahl, more probably belongs to Ziziphora. The common 
generic remark, of the calix being villous at the faux, is 
scarcely worth repeating; so many different genera hav- 
ing the same character; for example, the Hedeoma, Ztzie 
phora, Thymus, and Calamintha. 
23. HEDEOMA. Persoon. (Wild Pennyroyal.) 
Calix bilabiate, gibbous at the base, upper 
lip 3-teothed, lower 2; dentures all subulate. 
Corolla ringent. Stamina 2-sterile. The 2 fer- 
_ tile stamens about the length of the corolla. 
_- $mall herbaceous plants possessing the scent of the 
Mentha Pulegium. Leaves opposite; flowers verticillate, 
bracteate; calix internally ciliate-villous at the base of 
Bey the calycine indentions, (An American genus, with the 
ee exception of the H. thymoides of Montpelier. )f 
* 
~¢Srecres 1. H. glabra. Perennial, smooth; stem surculose; 
radical leaves nearly oval, stem leaves oblong-linear, obtuse, all 
entire and without veins; flowers upon longish peduncles, bi- 
_ bracteate at the base, towards the upper part of the stem most- 
dy verticillate in 3s. 
_ Ons. Stem six inches to a foot high, acutely angular, branch- 
ing from below; leaves nearly obtuse, conspicuously beset with 
. diaphanous glands, entirely smooth, without veins, and closely 
sessile. Flowers rather large, violet purple, somewhat campa- 
nulate and ringent; infertile stamens very short; calyx subcy- 
lindric oblong, internally ciliate at the faux. 
Has. Principally upon the banks of the St. Lawrence and 
the upper lakes; at the falls of Niagara: on the Ohio and in 
Tenne ay ys ON C: | cous rocks. 2 ; 
Ee Bon erat Pubescent; leaves oblong-lanceolate, ser- 
verticilli many-Aowered; flowers smaller than tha » 
ealix. From Canada to Carolina, © 
_, 3. * hirta. Dwarf, and branching near the base, pubescent; 
corapebeae olate, acutish at both extremities, entire, 
