LABIATAE (MINT FAMILY) 427 



late, sharply serrate: calyx villous with viscid hairs, the upper lobes acute: 

 corolla 7-12 mm. long, purple, rose, or cream-color. From Colorado and Ne- 

 braska southward to New Mexico. 



2. Teucrium laciniatum Torr. Ann. Lye. N. Y. 2: 231. 1828. Glabrous or 

 hirsute-pubescent, much branched from a woody perennial root: leaves pin- 

 nately 3-7-parted into narrow, linear, entire or 2 or 3-lobed or toothed divi- 

 sions, rather rigid ; the floral much crowded, 3-parted ; the upper equaling the 

 flowers: corolla pale blue or lilac, 12-20 mm. long, with spatulate lower lobe 

 much surpassing the calyx. From Wyoming to Arizona and Texas. 



2. SCUTELLARIA L. SKULLCAP 



Bitter perennial herbs with blue or violet flowers in simple racemes or soli- 

 tary in the axils. Calyx campanulate, 2-lipped, the lips entire and closed in 

 fruit, the upper with a helmet-like appendage on the back (which at length 

 becomes enlarged and concave). Corolla 2-lipped, the tube curved and di- 

 lated at throat; the upper lip arched, entire or nearly so; the lower lip spreading 

 or deflexed, the middle lobe broad, the lateral lobes small and somewhat 

 united to the upper lip. Stamens didynampus, ascending under the upper 

 lip, the upper pair the shorter; anthers ciliate, those of the upper pair of 

 stamens 2-celled, of the lower 1-celled. Nutlets papillose or tuberculate. 



Flowers in racemes, axillary or terminal . . . . . . 1. S. lateriflora. 



Flowers solitary in the axils. 

 Plant more or less glandular. 



Leaves longer than the internodes . . . . . . 2. S. Brittonii. 



Leaves shorter than the internodes 3. S. virgulata. 



Plant not glandular .......... 4. S. galericulata. 



1. Scutellaria lateriflora L. Sp. PI. 598. 1753. Glabrous, 3-5 dm. high, 

 leafy: leaves thin, oblong-ovate and ovate-lanceolate, acuminate, coarsely 

 serrate, rounded at base, slender-petioled ; the lower floral ones of the termi- 

 nal racemes similar: flowers small, about 6 mm. long, mostly in lateral ra- 

 cemes: lips of the corolla short, equal. Widely distributed, but rare in our 

 range. 



2. Scutellaria Brittonii Porter, Bull. Torr. Bot. Club 21: 177. 1894. Glan- 

 dular or viscid-pubescent, branching from the base, 1-2 dm. high: leaves ob- 

 long or oval, sessile and entire or the lowest short-petioled and slightly cren- 

 ulate, obtuse, rather prominently veined on the lower surface, 1-2 cm. long, 

 mostly longer than the internodes: flowers solitary in the axils; the pedicels 

 mostly shorter than the calyx: corolla pubescent, blue, 20-25 mm. long. S. 

 resinosa Torr. in part. Wyoming and Colorado and probably western Ne- 

 braska. 



3. Scutellaria virgulata A. Nels. Bull. Torr. Bot. Club 25: 283. 1898. 

 Similar but merely puberulent, taller; stems slender, generally simple: leaves 

 nervose, green, obscurely puberulent; the lower much shorter than the inter- 

 nodes: calyx green (even the crest): corolla blue, gradually dilated upward, 

 glabrous in the throat and glandular-puberulent outside: nutlets minutely 

 tuberculate. From Wyoming to Colorado. 



4. Scutellaria galericulata L. Sp. PL 599. 1753. Nearly glabrous or slightly 

 pubescent, slender, 3-7 dm. high, simple or paniculately branched above: 

 leaves ovate-lanceolate, broadest next the subsessile subcordate base, 3-5 cm. 

 long, all but the upper appressed-serrate : corolla puberulent, 12-18 mm. 

 long; lower lip nearly erect and surpassing the upper. Stream banks; across 

 the continent. 



3. MENTHA Tourn. MINT 



Odorous herbs, with simple mostly punctate leaves and small flowers 

 usually in close clusters forming axillary capitate whorls or interrupted spikes. 

 Calyx 5-toothed, tubular or bell-shaped. Corolla campanulate, with subequal 

 lobes and included tube. Stamens 4, equal, with glabrous filaments bearing 

 anthers with parallel cells. Nutlets ovoid and smooth. 



