214 LABIATE. IMarrubium. 



ever be readily distinguished from M. arvensis by its stouter, more erect 

 stems, and somewhat rounded heart-shaped leaves, which are deeply 

 serrated. 



10. M. Pulegium. Linn. Penny-royal. Flowers \vhorled ; 



leaves ovate ; stem prostrate ; flowerstalks and calyx all over 



downy, teeth of the latter fringed. Br. Fl. I. p. 271. E. Fl. v. 

 in. p. 87. E.Bot.t.1026. 



Wet commons. Ballycotton near Cork ; Mr. J. Drummond. Very 

 plentiful at Calnafersy and other places near Killarney. In a small is- 

 land called the Creagh, in Lough-beg, County of Deny ; Mr. D. Moore. 

 Fl. Aug. 1. The smallest of the genus, readily known by its pros- 

 trate stems, and small frequently recurved leaves, both of which are 

 thickly covered with short hairs. Smell powerful. Much employed 

 medicinally. 



8. BALLOTA. Linn. Black Horehound. 



Calyx somewhat salver-shaped, equal, with ten ribs and five 

 broad, mucronated teeth, naked within. Corolla with the 

 upper lip erect, concave ; lower one trifid, middle lobe the 

 largest, emarginate. Cells of the anthers spreading Name, 

 fta\\u)Tij, from pa\\w, to reject, on account of % its disagree- 

 able smell. Didynamia. Gymnospermia. 



1. B. nigra, Linn. Black Horehound. Leaves ovate, cre- 

 nato-serrate ; teeth of the calyx shortly acuminate, patent, 

 longer than the tube of the corolla. Br. FL 1. p. 274. E. Fl. 

 v. iu. p. 101. E. Bot. t. 46. 



Waste places near towns and villages, frequent. FL July, Aug. % . 

 About two feet high. Flowers in whorls, purple. Whole plant 

 foetid. 



9. MARRUBIUM. Linn. White Horehound. 



Calyx with ten ribs and five or ten spreading teeth, the throat 

 hairy. Corolla with the tube exserted, upper lip straight, 

 linear, cloven ; lower one 3-lobed, middle lobe the largest, 

 emarginate. Name of doubtful origin ; some say from a 

 town so called in Italy. Didynamia. Gymnospermia. 



1. M. vulgare, Linn. White Horehound. Stem erect ; 

 leaves roundish, ovate, toothed, wrinkled ; calyx with ten seta- 

 ceous hooked teeth. Br. Fl. 1. p. 279, E. FL v. iii. p. 103. 

 E. Bot.t. 410. 



Waste places and way-sides. Strand near Carrigaline, County of 

 Cork ; Mr. J. Drummond. Old Churchyard at Howth, and various 

 places in the County of Wicklow between Dunganstown and the sea. 

 Fl. Aug. %. One to a foot and a half high, bushy, very hoary with 

 a white, thick pubescence or woolliness. Flowers small, almost white, 

 in crowded whorls. Smell aromatic ; flavour bitter. The plant is much 

 sought after for coughs and asthma. 



