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 (1' -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. 



•*- •*- Lateral lobes of the corolla small, much shorter than the decidedly arched or in- 

 curved upper lip, and connected with it : stem erect : leaves moderately petioled, 

 except in JS T o. 6. 



3. S. can6scens, 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 

 soft 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 

 (l°-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, Maryland, Illinois, and southward. 



.* 5. S. pilbsa, Michx. Pubescent with spreading hairs; stem nearly simple 

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

 '\'V(a. J s h-° vate > tne 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. hirsiita, Short, is a large form.) —Dry ground, S. New YorkV) Michigan 

 and southward. 



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

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

 very short-petioled ; raceme often branched ; corolla (1' long) much enlarged above, 

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

 (Mr. ilou-ard), 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. 



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



equal in length, the upper lip concave. 



7. S. nerv6sa, Pursh. Smooth, simple or branched, slender (10' -20' 

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

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

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



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

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

 entire or nearly bo, slightly heart-shaped (6" -8" long). (S. ambigua, JVutt.) — 

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



