36 DIDYNAMIA. GYMNOSPERMIA. 



most inibilcatecl in a leafy capitulum, very small, and 

 nearly white; calix avvned, arid and membranaceous, se- 

 miquinqtjefid; bract^-s divaricately awned; upper lip of" 

 tlie corolla emarginate, arched; lower o-lobed, central 

 lobe subcrenate. Flowerjnjj time, July. Apparently al-. 

 lied to D. Moldavica, but the leaves are entirely destitute 

 of pitnctures: scarcely a congener with D. virginianum^ 

 and closely allied to Jylelissa. 

 Principally a Siberian genus. 



415. MELISSA. L, (Balm.) 



Calix arid, above nearly flat: upper lip s^ib- 

 fasti.8:iate. Upper lip of the Corolla partly vault- 

 ed, bifid; middle lobe of the lower lip cordate. 



Herbaceous, and aromatic; flowers axillary, shortly pe- 

 dunculate. 



Species. 1. M. offcincJis. In many places common- 

 ly naturalized along road sides and lanes. 



An European genus, at present including only 2 species, 



414. =^MACBRII)EA.t Elliott. 



« Calix subturbinate, trifid; 2 of the segments 

 lari^er and oval, the 3d linear- lanceolate. Co- 

 ro^/a ringent; upper lip entire, the lower shorter 

 and 3-parted." 



Leaves opposite entire; " spike terminal, verticills most- 

 ly 4.flo\vered, flowers large and reddish, striped with 

 white." 



" M. pulchrar 



" Thjmbra caroUniana. Walter, p. 162.'* Hab. " In 

 the narrow swamps and Bay-galls in the central part.s of 

 South Carolina. Flowering from July to September." 

 Elliott, Mss. Apparently allied to JMelittis. 



415. PRUNELLA. L. (Self-heal.) 



Upper lip of the calix dilated. Filaments of 

 the stamina forked, only one of the points an- 

 theriferous. Stigma bifid. 



t So named by Stephen Elliott,Esq. in honour of his friend the 

 late James Macbride, M. D. an assiduous botanist, whose assis- 

 tance to many of the southern plants is gratefully acknowledg- 

 ed by that author. 



