DIDYNAMIA— GYMNOSPERMIA. Mamibium. 103 



cuHar pungent and disagreeable scent. Stem 2 or 3 feet high, 

 erect, branched, leafy, clothed with recurved hairs. Leaves 

 stalked, an inch or more in length, ovate, or slightly heart, 

 shaped, strongly and nearly equally serrated. Whorls all axillary, 

 many-flowered, stalked, compound, bracteated, often accom- 

 panied by small leaves. Bracteas bristle-shaped, shorter than 

 the calyx, fringed. Cal. cylindrical, hairy, with 10 furrows and 

 as many ribs ; the upper part dilated and funnel-shaped, with 

 5 very short, abrupt, veiny, marginal lobes or teeth, each tipped 

 with a small spreading bristly point. Cor. dull purple, in /3 

 white J upper lip cloven, vaulted, externally clothed with white 

 hairs, more or less converging into a pointed tuft 3 lower 3- 

 lobed, marked with white veins, the central lobe inversely heart- 

 shaped. 

 Our plantis the original B. nigra of Linnseus, and of most authors; 

 though this great botanist, in the 2nd edition of his Sp. PL, as 

 well as in the Flora Suecica, has confounded with it another 

 species, indigenous likewise to Sweden, but distinguished by the 

 elongated, lanceolate, tapering shape of its calyx-teeth, and the 

 more unequal serratures of its leaves. This latter is given as 

 B. nigra in Ehrhart's PL Off. 456, and is certainly the Marru- 

 hiastrum oi Riv'inus, Monop. Irr.t.Qh.f. 1. It appears moreover 

 to be the Balloten. 259 of Hailer, who, under his white variety, 

 remarks that the calyx is not abrupt. I have met with no traces 

 of this species in Britain, the error of Linnaeus having caused 

 some inaccuracy in the account given in E)igL Bof. 



295. MARRUBIUM. White Horehound. 



Linn. Gen.294. Juss.l\4. FLBr.636. Tourn.t. 91. Lam. t. 508. 



Cal. tubular, funnel-shaped, with 10 furrows, permanent 

 and finally hardened ; limb spreading, regular, with 10, 

 in some species but 5, narrow teeth. Cor. ringent; tube 

 cylindrical ; throat elongated, tubular ; limb spreading ; 

 upper lip erect, linear, in 2 acute lobes ; lower broadest, 

 reflexed, in 3 deep lobes, the lateral ones acute, the mid- 

 dle one largest and cloven. Filam. much shorter than 

 the corolla, sheltered under the upper lip. Anth. small, 

 oblong. Gcn«. rounded, 4-lobed. jS'i'j/Z^ thread-shaped, 

 as long as the stamens. Stigma cloven, acute. Seeds 4, 

 elliptic-oblong, in the bottom of the hardened calyx, 

 which is contracted at the orifice. 



Herbaceous, branched ; downy, or somewhat woolly; aro- 

 matic or bitter. Leaves stalked, veiny, bluntly serrated, 

 undivided. Fl. numerous, white or purplish, in dense 

 axillary 'whorls. 



