418 LABIATE. (mint FAMILY.) 



loundish-ovate, tlie lower abrupt or heart-shaped at base and long-petioleaj 

 the upper on short margined petioles, veiny ; bracts oblong-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 'lex. 

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



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



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

 narrower less a einy leaves. — N. J. to Va. 



7. S. integrif olia, L. Downy all over with a minute hoariness ; stem 

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

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

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



* * * Flowers solitary in the axils of the upper mostly sessile leaves, which re- 

 semble the lower ones but are occasionally reduced. 



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

 tuberiferous, low, many-stemmed in a tuft, minutely cinereous-puberulent, 

 very leafy; leaves ovate or spatulate-oblong, 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. galericul^ta, 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 hi so. 



11. S. Iierv6sa, Pursh. Smooth, simple or branched, slender, 10-20' 

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

 (r 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. BRUNELLA, 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- 

 spreading, 3-cleft, its lateral lobes ol>long, 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 



