LABI AIM:. 583 



cordate-ovate or ovate-lanceolate, serrate-crenate, rugose, hispid, the lower 

 smooth ; whorls 6 10-flowered, distinct ; teeth of the calyx lanceolate, 

 acute and somewhat spiny. S. sylvatica Nutt. 



Moist woods. Can. to Car. W. to Oregon. July, Aug. "I].. Stem 23 

 feet-high, branched, mostly hispid on the angles. Flowers purplish ; the whorls 

 forming a long terminal spike. Marsh Hedge Nettle. 



25. MARRUBIUM. Linn. Horehound: 

 (Of doubtful origin, some say from a town so called in Italy.) 



Calyx tubular, 5 10-nerved, with 5 10 spreading teeth ; 

 the throat hairy. Corolla 2 -lipped ; upper lip flattish or concave ; 

 lower 3-lobed, the middle lobe broader and usually emarginate. 

 Stamens 4, included ; the lower pair longer. 



M. vidgare Linn. : stem erect, white and woolly ; leaves roundish-ovate, 

 toothed, rugose, very woolly beneath ; whorls villous, many-flowered ; calyx 

 with 10 setaceous hooked teeth. 



Road sides. Can. to Car. W, to Miss. July, Aug. %. Stem 1218 

 inches high, branched from the base, covered with a white wool. Flowers 

 small, white, in crowded whorls. Smell aromatic ; flavor bitter. Medicinal. 

 Introduced from Europe. White Horehound. 



26. BALLOTA. Linn. Fetid Horehound. 

 (From the Greek /JaAAo), to reject ; on account of its disagreeable smell.) 



Calyx funnel-form, 10-nerved, with 5 10 broad mucronate 

 teeth. Corolla 2-lipped ; upper lip erect, somewhat concave, 

 emarginate ; lower trifid, the middle lobe largest and emarginate. 

 Stamens 4, ascending ; the lower pair longer. 



B. nigra Linn. : hairy or smoothish ; leaves ovate, truncate at base, 

 green on both sides, more or less hairy ; teeth of the calyx 5, dilated at the 

 base, subulate-mucronate at the summit. 



At Hull, Mass. Big. July. %. Stem 23 feet high. Flowers purple, 

 rarely white, in whorls. Whole plant fetid. Introduced from Eurupe. 



Black Horehound. 



VIII. AJUGOIDEJE. Corolla with the upper Up very short, sometimes 

 bifid, with the segments mostly depending. Stamens 2 or 4, ascending, 

 exserted. Achenia more or less reticulate-rugose. 



27. TRICHOSTEMA. Linn. Trichostema. 



(From the Greek 0f>ifj r f"X?j ; i fnir. ;in;l or^//a, a stamen; in allusion to its 

 hair-like stamens.) 



Calyx campanulate, oblique, resupinate, unequally 5-cleft; 

 the three upper teeth (apparently lower) elongated ; the two 

 others short. Corolla with the tube slender ; upper lip falcate. 

 Stamens 4, very long and curved. 



