240 WEEDS AND USEFUL PLANTS. 



due subjection. Another species (L. purpu'reum, L.] has also been intro- 

 duced in some localities ; but it does not appear to multiply so rapidly. 



16. LEONU'KUS, L. MOTHERWORT. 



[Greek, Leon, a lion, and Oura, a tail ; from some fancied resemblance.] 



Calyx turbinate, 5 -10- nerved, the limb truncate, 5-toothed ; teeth 

 subulate, subspinescent, finally spreading. Corolla bilabiate, the upper 

 lip oblong, entire, flattish or somewhat arched lower lip spreading, 3- 

 lobed, the lateral lobes oblong the middle one entire or sometimes ob- 

 cordate. Stamens 4, ascending under the upper lip ; anthers approximat- 

 ed in pairs, 2-celled, the valves naked. Akenes triquetrous, truncate at 

 summit, smooth. Mostly perennial herbs with cut-lobed leaves and close 

 whorls of flowers in their axils. 



1. L. Cardia'ca, L. Lower stem-leaves palmate-lobed, the upper ones 

 cuneate-oblong, mostly trifid, with a lengthened narrow base, the lobes 

 of all the leaves ovate or lanceolate ; corolla longer than the calyx- teeth ; 

 the tube with a villous ring within at base ; upper lip flattish, hirsutely 

 villous ; lower lip spreading, the middle lobe entire. 



CARDIAC LEONURUS. Mother wort. 



Fr. L'Agripaume. Germ. Das Herzgespann. Span. Agripalma. 



Root perennial Stem 2-4 feet high, branched at base and above, retrorsely pubescent, 

 with a hairy ring at the joints or nodes. Leaves 2-4 inches long, rugose, the lower ones 

 nearly orbicular in the outline ; petioles 1-2 inches long. Cymules 3-6 or 8-flowered, 

 sessile, distant, forming an interrupted leafy spike 6-12 or 15 inches in length ; bracteoles 

 subulate, smooth. Calyx strongly 5-ribbed, smoothish ; teeth acuminate, pungent, the 

 lower ones rather longer. Corolla pale purple, externally very villous, especially on the 

 upper lip. Akenes hirsute at summit. 



Fence rows and waste places : introduced. Native of Europe and Asia. Fl. June.- 

 July. Fr. August. 



Obs. This foreigner is completely naturalized, and is apt to occupy all 

 neglected nooks and waste places about farm-yards and along field-sides. 

 It is an utterly worthless weed unsightly and disagreeable, and speed- 

 ily gives a forlorn appearance to the premises of the slothful and sloven- 

 ly farmer. There is another Species (L. marrubias'trum, L.) which has 

 become partially naturalized in some districts ; but it does not threaten 

 to become so prevalent and troublesome, 



17. TEU'CRIUM, L. GERMANDER. 



[Named from Teucer, a Trojan prince, who, it is said, first used the plant.] 



Calyx tubnlar-campanulate, nearly equally 5-toothed. Corolla with the 

 tube short, the 4 upper lobes of the limb nearly equal, oblong and de- 

 clined, or very short and rather erect, the lowest lobe largest, oblong or 

 rounded, mostly concave. Stamens 4, exserted from the cleft between 

 the upper lobes of the corolla ; anthers with the cells confluent. Cijmules 

 few-flowered in a terminal rather crowded greyish-green spike. 



