BLUE AND PURPLE GROUP 



but grow to 4 or 5 inches in length. Leaves, the upper long, 

 narrow, acute, sessile, entire; lower pinnately cleft into 3 lobes, 

 which are much cut and toothed, with margined petioles. Stem, 

 square, 1 to 3 feet high, much branched. June to September. 



Often a weed in cultivated grounds ; found also in old waste 

 fields and along roadsides, from Maine to Florida, more 

 common in the Middle States. 



False Pennyroyal 



Isanthus bra.chia.tus — Family, Mint. Color, pale blue. Calyx, 

 bell-shaped with 5 equal lobes. Corolla, small, about \ inch long, 

 with nearly equal, blunt, spreading lobes. Stamens, 4. Flowers, 



1 to 3, on peduncles, in the leaf-axils. Leaves, entire, 3 -nerved, 

 narrow and long. Plant low, much branched, downy and 

 clammy. July and August. 



Dry, sterile soil, Vermont to Minnesota and southward. 

 Blue Curls. Bastard Pennyroyal 



Trichostema dichotomum — Family, Mint. Color, blue. Calyx, 

 2-cleft, the 3 upper teeth longer than the 2 lower. Corolla, 

 tubular, 2-lipped, the lobes all linear. Stamens, with long, curved 

 filaments which project far out of the flower. Flowers, pedicelled, 



2 or 3 together, with bracts under the peduncles, making loose 

 panicles. Leaves, lance-shaped to oblong, the lower petioled, en- 

 tire. Stem, 4 to 8 inches high, clammy, viscid, glandular, with 

 a not wholly agreeable fragrance. July to October. 



Dry fields, almost a weed. By a twisting of the pedicels 

 the flower becomes inverted. (See illustration, p. 334.) 



T. linekre. — Color, blue, and flowers like the last. Leaves, 

 linear, sessile, $ to 2 inches long. Stem, smooth, slender, branch- 

 ed above. Fruit of this and the preceding species 4 well-marked 

 nutlets. July and August. 



Near the coast, dry, sandy fields and pine barrens, Con- 

 necticut to Georgia and Louisiana. 



Mad-dog Skullcap 

 Scutellaria lateriflora — Family, Mint. Color, blue. Calyx, bell- 

 shaped, divided, the upper lip with a liood, a protuberance which 

 makes the plant easily recognizable. Later this falls away, but 

 the lower lip remains. Corolla, a curved tube, divided above 

 into 2 lips, the upper arched and curved, the lower spreading. 

 Leaves, ovate or lance-shaped, serrate with coarse teeth, short - 

 petioled. Stem, 8 to 24 inches high, upright, branched. Flowers, 



333 



