356 LABIATE. (MINT FAMILY.) 



form of this, as is S. rugosa, Wood. (The latter from Harper's Ferry, Dr. Aikin, 

 according to Wood.) 



2. S. saxatilis, Riddell. Smoothish or slightly hairy ; stem weak, ascend- 

 ing (6' - 18' long), often producing runners, branched ; leaves ovate or ovate-oblong 

 and mostly heart-shaped, coarsely crenate-toothed (l'-2' long), thin, obtuse; upper 

 bracts oblong or ovate, small; racemes loose. Moist shaded banks, S. Ohio, 

 Virginia, and Kentucky, and southward in the mountains. Corolla 8" long, 

 the lateral lobes connected with the straightish upper lip. 



-<- -t- Lateral lobes of the corolla small, much shorter than the decidedly arched or in- 

 curved upper Up, and connected with it: stem erect: leaves moderately petiolcd, 

 except in No. 6. 



, 3. S. canescens, Nutt. Stem branched (2 -4 high) above, with the 

 panicled many-flowered racemes, flowers, and the lower surface of the ovate or lance- 

 ovate acute (at the base acute, obtuse, or cordate) crenate leaves whitish with fine 

 so/I down, often becoming rather glabrous ; bracts oblong or lanceolate ; upper 

 lip of the corolla shorter than the lower. Rich ground, Penn. to Illinois and 

 southward. Corolla 8" long. 



4. S. serrata, Andrews. Green and nearly glabrous; stem rather simple 

 (1 3 high), with single loosely-flowered racemes; leaves serrate, acuminate at 

 both ends, ovate or ovate-oblong ; calyx, &c. somewhat hairy ; lips of the corolla 

 equal in length (corolla 1' long, the tube more tapering below than in the last, 

 which this resembles). Woods, Penn. to Illinois, and southward. 



5. S. pi!6sa, Michx. Pubescent with spreading hairs; stem nearly simple 

 (1 -3 high) ; leaves rather distant, crenate, oblong-ovate, obtuse, varying to round- 

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

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

 often branched ; corolla (6"- 8" long) rather narrow, the lower lip a little shorter. 

 (S. hirsuta, Short, is a large form.) Dry ground, S. New York to Michigan 

 and southward. 



6. S. integrif61ia, L. Downy all over with a minute hoariness ; stem com- 

 monly simple (l-2 high) ; leaves oblong-lanceolate or linear, mostly entire, obtuse, 

 very short-petioled ; raceme often branched ; corolla (!' long) much enlarged above, 

 the ample lips equal in length. Borders of thickets, from Bridgewater, Mass. 

 (Mr. Howard), to Pennsylvania and southward. 



* * Flowers (blue or violet, short-peduncled) solitary in the axils of the upper mostly 



sessile leaves, which are similar to the lower ones. 



-t- Corolla (2" -3" long] seldom thrice the length of the calyx ; the short lips nearly 

 equal in length, the upper lip concave. 



7. S. nervdsa, Pursh. Smooth, simple or branched, slender (10' -20' 

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

 (!' long) ; the floral ovate-lanceolate, entire ; nerve-like veins prominent beneath. 

 (S. gracilis, Ntitt.) Moist thickets, New York to Illinois and southward. 



8. S. parvula, Michx. Minutely downy, dwarf (3 f -6' high), branched 

 and spreading ; lowest leaves round-ovate ; the others ovate or lance-ovate, obtuse, all 

 entire or nearly so, slightly heart-shaped (6" -8" long). (S. ambigua, Nutt.) 

 Dry banks, W. New England to Wisconsin and southward. May, June. 



