210 



N. Ord. LABIATE. 

 Tribe Stachydea. 



Genus Marrubium,* Linn. B. & H., ii, p. 1206. Species 30 

 natwes of temperate Europe and Asia and the Mediterra- 

 nean region. 



210. Marrubium vulgare, Linn., 8 P . Plant., ed. 1, P . 583 (1753). 

 Horehound. White Horehound. 



Figures. Woodville, t. 118; Steph. & Ch., 1. 135 ; NCOS, 1. 174; Hayno, 

 xi, t. 40; Berg & Sch., t. 24 b; Syme, E. Bot., vii, t. 1064; Reich.] 

 Ic. Fl. Germ., xviii, t. 1224. 



Description. A perennial herb with a short rootstock giving 

 off several stout, tough stems, about 1 foot high, branched below, 

 bluntly quadrangular, more rounded below, densely covered, 

 especially when young, with a thick white cottony felt. Leaves 

 opposite, blade reaching an inch in length, on a long, broad, 

 woolly petiole, ovate, acute or blunt, coarsely crenate- serrate, 

 veins very prominent on the under surface, depressed above, 

 making the leaf very wrinkled, the larger ones radiating from 

 the petiole, pale silvery-green, downy above, very cottony 

 beneath. Flowers sessile, few, crowded, small, forming small, 

 very dense, rounded whorls in the axils of the upper leaves, 

 bracts linear, woolly. Calyx tubular, oblong, cylindrical, faintly 

 10-ribbed, woolly externally with stellate hairs, with 10 spread- 

 ing, spinous, fringed, rather short teeth, hooked at the ends, the 

 5 alternate ones shorter, the throat with a ring of long hairs 

 inside. Corolla slightly exceeding calyx, with a slender tube, 

 bilabiate, the upper lip longer than the lower, narrow, oblong, 

 deeply bifid, the lower 3-fid, white, glabrous. Stamens 4, 

 inserted about midway in the tube and included in it, anther-cells 

 confluent by their apices. Style bifid, branches very short. 

 Achenes dark brown, blunt. 



Habitat. This plant grows in waste ground throughout 



* Marruliuw, the classical Latin name. 



