36 DIDYNAMIA. GYMNOSPERMIA. 



most imbricated in a leafy capitulum, very small, and 

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

 miquinquefid; bractes divaricately awned; upper lip of 

 the corolla emurginate, arched; lower 3-lobed, central 

 lobe subcrenate. Flowering" time, July. Apparently al-. 

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

 of punctures: scarcely a congener with D. virginianum, 

 and closely allied to Melissa. 

 Principally a Siberian genus. 



415. MELISSA. L. (Balm.) 



Calix arid, above nearly flat; upper lip sub- 

 fasti.qiate. 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. oJicinaUs. In many places common- 

 ly naturahzed along road sides and lanes. 



An European genus, at present including only 2 species. 



414. *MACBRII)EA.t Elliott, 



« Calix subturbina(e, trifid; 2 of the segments 

 larger 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-flowered, flowers large and reddish, striped with 

 white." 



" M. pulchraV 



*' Thymbra caroliniana. Walter, p. 162." Hab. "In 

 the nai row swamps and Bay-galls in the central parts of 

 South Carolina. Flowering from July to September.'* 

 Elliott, Mss. Apparently allied to Melittis. 



415. PRUNELLA, i. (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. 



