Vol. III.] 



MINT FAMILY. 



93 



I. Leonurus Cardiaca L. Mother- 

 wort. (Fig. 3108.) 



Leonurus Cardiaca I,. Sp. PI. 5S4. 1753. 



Perennial, puberulent; stem rather stout, 

 strict, commonly brancbed, 2"-$° tall, the 

 branches straight and ascending. Leaves 

 membranous, slender-petioled, the lower 

 nearly orbicular, palmatel}- 3-5-cleft, 2.'-\' 

 broad, the lobes acuminate, incised or dentate; 

 upper (floral) leaves narrower, oblong-lanceo- 

 late or rhombic, 3-cIeft, or the uppermost 

 merel}' 3-toothed; flower-clusters numerous, 

 exceeded by the petioles; calyx-teeth lanceo- 

 late, subulate, somewhat spreading, nearly as 

 long as the tube; corolla pink, purple or white, 

 3"-5" long, its tube wilh an oblique ring of 

 hairs within, its upper lip slightly concave, 

 densely white-woolly without, the lower lip 

 mottled; anther-sacs parallel. 



In waste places, especially about dwellings. 

 Nova Scotia to North Carolina, Minnesota and 

 Nebraska. Naturalized from Europe. Native al- 

 so of Asia. Also called Cowthwort. June-Sept. 



2. Leonurus Sibiricus L. Siberian 

 Motbervvort or Lion's-tail. (Fig. 3109.) 



Leonurus Sibiricus L. Sp. PI. 5S4. 1753. 



Biennial, puberulent or glabrate; stem stout, 

 branched, 2°-6° high, the branches slender. 

 Leaves long-petioled, deeply 3-parted into ovate 

 or lanceolate, more or less cuneate, acute or 

 acuminate deeply cleft and incised segments, 

 the lobes lanceolate or linear, acute; lower 

 leaves sometimes 6' wide, the uppermost linear 

 or lanceolate, slightly toothed or entire; clus- 

 ters numerous, dense, usually all axillary; 

 calyx campanulate, 3" long, glabrous or mi- 

 nutely puberulent, its bristle-shaped teeth 

 slightly spreading, shorter than the tube; cor- 

 olla purple or red, densely puberulent without, 

 4"-6" long, its tube naked within, the upper 

 lip arched; anther-sacs divergent. 



In waste and cultivated soil, southern Pennsylva- 

 nia and Delaware. Naturalized from eastern Asia. 

 Widely distributed in tropical America as a weed. 

 May-Sept. 



3. Leonurus Marrubiastrum L. 



Hoarhound Motherwort or 



Liou's-tail. (Fig. 3110.) 



Leonurus Marrubiastrum L. Sp. PI. 584. 1753. 

 Biennial, puberulent or pubescent; stem 

 stout, branched, 2°-5° high. Leaves peti- 

 oled, ovate or ovate oblong, acxite or obtuse 

 at the apex, narrow-ed at the base, coarsely 

 crcnate or incised-dentate, i'-3' long, ^'- 

 ^Yi' wide, the upper narrower; flower-clus- 

 ters dense, numerous, axillary; calyx finely 

 puberulent or glabrate, its bristle-shaped 

 somewhat spreading teeth mostly shorter 

 than the tube; corolla nearly white, glabrate, 

 about 4" long, its tube scarcely exceeding the 

 calyx, naked within, its lower lip ascending. 



In waste places, New Jersey (according: to S. 

 Watson ), southern Pennsylvania and Delaware. 

 Naturalized from Kurope. Native also of Asia. 

 June-Sept. 



