418 LABIATE. (MINT FAMILY.) 



roundish-ovate, the lower abrupt or heart shaped at base and long-petioled, 

 the upper on short margined petioles, veiny ; bracts obloug-spatulate ; racemes 

 short, often branched ; corolla 6" long, rather narrow, the lower lip a little shorter. 



Dry or sterile ground, southern N. Y. to Mich., south to Fla. and Tex. 

 Var. hirsuta, Gray, is a large form (sometimes 3 high), more hirsute, 



with larger very coarsely creuate leaves (2-3' long). Richer soil, Ky. 



Var. ovalifolia, Benth., is a form with shorter and finer pubescence, and 

 narrower less veiny leaves. N. J. to Va. 



7. S. illtegrifolia, L. Jjowm/ all over with a minute hoar/ness; stem 

 commonly simple (1-2 high) ; leaves oblong-lanceolate or linear, mostly entire, 

 obtuse, very short-petioled ; corolla 1' long, much enlarged above, the ample lips 

 equal in length. Dry ground, N. Eng. to Fla. and Tex. 



* * * Flowers solitary in the n.rils of the njtper mostly sessile leares, which re- 

 semble the lower ones but are occasionally reduced. 



8. S. Wrightii, Gray. Firm and woody at base, not stoloniferous nor 

 tuber if erous, low, many-stemmed in a tuft, minutely cinereous-puberulent, 

 very leafy ; leaves ovate or spatulate-obloug, entire, subsessile (-' long), the 

 upper floral shorter than the flowers ; corolla pubescent (' long), usually 

 violet. Kan. to Tex. 



9. S. parvula, Michx. Herbaceous ; subterranean stolons moniliform- 

 tuberiferous ; minutely downy, dwarf (3-6' high), branched and spreading; 

 all but the lower leaves sessile and entire, the lowest round-ovate, the others 

 ovate or lance-ovate, slightly heart-shaped (6 - 8" long) ; corolla 2 - 4" long. 

 Sandy banks, W. New Eng. to Minn., south to Fla. and Tex. Var. MOLLIS, 

 Gray, is more spreading, softly pubescent throughout, with larger less firm 

 leaves. Sandy banks, S. 111. to Kan. 



10. S. galericulata, L. Herbaceous ; subterranean stolons not tuberif- 

 erous ; smooth or a little downy, erect (1-2 high), simple; leaves ovate- 

 lanceolate, acute, serrate, roundish and slightly heart-shaped at base (1-2' 

 long) ; corolla violet-blue, 8 - 9" long, with slender tube, the large lower lip 

 nearly erect. Wet shady places; common especially northward. (Eu.) 



2. Nutlets conspicuously winged, each raised on a slender base. 



11. S. nervosa, Pursh. Smooth, simple or branched, slender, 10-20' 

 high ; lower leaves roundish, the middle ovate, toothed, somewhat heart-shaped 

 (I' long), the floral ovate-lanceolate, entire; nerve-like veins prominent be- 

 neath ; corolla bluish, 4" long, the lower lip exceeding the concave upper one. 



Moist thickets, N. Y. to Ind., south to Va. and Mo. 



26. BRtTNELLA, Tourn. SELF-HEAL. 



Calyx tubular-bell-shaped, somewhat 10-nerved and reticulated-veiny, flat- 

 tened on the upper side, naked in the throat, closed in fruit, 2-lipped ; upper 

 lip broad and flat, truncate, with 3 short teeth, the lower 2-cleft. Corolla as- 

 cending, slightly contracted at the throat and dilated at the lower side just 

 beneath it, 2-lipped ; upper lip erect, arched, entire ; the lower reflexed- 

 spreadiug, 3-cleft, its lateral lobes oblong, the middle one rounded, concave, 

 denticulate. Stamens 4, ascending under the upper lip ; filaments 2-toothed 

 at the apex, the lower tooth bearing the anther; anthers approximate in pairs, 



