ioo Introduction to Botany. 



and generally resiniferous. Leaves ovate to spatulate-oblong, entire, obtuse, from 

 4 to 5 inch long. Flowers solitary in the axils of the upper leaves. Corolla 5 to | 

 inch long, violet to nearly white, pubescent. On western plains. 



4. Scutellaria parvula, Michx. (L., parvulus, very small.) SMALL SKULL- 

 CAP. Perennial from slender, tuberiferous rootstocks. Erect or ascending, 3 to 

 12 inches high. Minutely downy. Lower leaves round-ovate, upper lance-ovate. 

 Flowers solitary in the axils of the upper leaves. Corolla | to 5 inch long, violet, 

 pubescent. In moist, sandy soil. 



5. Scutellaria campestris, Britton. (L., campestris, belonging to the field.) 

 PRAIRIE SKULLCAP. Perennial from tuberous-thickened rootstocks. More or 

 less spreading. Leaves ovate, rounded or truncate at the base, often dentate. 

 Minutely pubescent. Flowers violet or purple. Listed by Gray as var. mollis of 

 the preceding species. In dry, sandy soil. 



6. Scutellaria nerv6sa, Pursh. (L., nervosus, full of nerves.) VEINED SKULL- 

 CAP. Perennial from slender stolons. Slender, 8 inches to 2 feet high. Lower 

 leaves rounded to ovate, coarsely serrate or dentate, upper leaves ovate-lanceolate 

 and entire. Flowers solitary in the axils of the upper leaves. Leaves prominently 

 nerved beneath. Corolla bluish, about J inch long. Lower lip longer than the 

 concave upper one. In moist thickets or woods. 



II. NEPETA. Cat Mint. 



(The Latin name.) 



Erect or creeping herbs. Flowers in verticillate clusters. Calyx 

 tubular, obliquely 5-toothed. Corolla 2-lipped, the upper lip erect, 

 2-cleft, or notched, somewhat concave ; the lower lip 3-cleft and spread- 

 ing. Stamens 4, ascending close to the upper lip, didynamous, the 

 lower pair shorter. Anthers approximate in pairs. 



i. Nepeta Glech6ma, Bentham. (Gr. ; glechon, pennyroyal.) GROUND IVY. 

 GlLL-OVER-THE-GROUND. Perennial, pubescent, creeping and trailing. Leaves 

 round-kidney-shaped, green both sides, petioled, crenate. Corolla light blue, 2 or 

 3 times longer than the calyx. In damp or shady places. 



III. LAMIUM. Dead Nettle. 



(Gr. , laimos, throat, alluding to the ringent corolla.) 



Mostly diffuse annual or perennial herbs. Leaves commonly heart- 

 shaped in general outline, and crenate, dentate, or entire. Flowers 

 verticillate in axillary or terminal clusters. Calyx tubular-campanulate, 

 with 5 equal or unequal teeth, and about 5-nerved. Tube of the corolla 

 longer than the calyx, dilated in the throat, 2-lipped ; the upper lip con- 

 cave and generally entire, narrowed at the base ; the lower lip spread- 

 ing, 3-lobed, the middle lobe emarginate. Stamens 4, didynamous, 

 close under the upper lip, approximate in pairs, the anterior pair 

 longer. 



