LABIATE. (MINT FAMILY.) 315 



short, often branched; corolla (h' -%' long) rather narrow, the lower lip a little 

 shorter. (S. hirsiita, Short, is a large form.) — Dry open woods, &c., S. New 

 York to Michigan and southward. June -Aug. 



6. S. integrifoiia, 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 (1' long) much enlarged above, 

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

 Mass. (Mir. Howard), to Pennsylvania and southward. June -Aug. 



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



sessile leaves, which are similar to the lower otus. 



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



equal in length, the upper liji concave. 



7. S. nervosa, Parsh. Smooth, simple or branched, slender (10' -20' 

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

 (l'long); the upper floral ovate-lanceolate, entire ; the nerve-like veins promi- 

 nent underneath. (S.. gracilis, Nutt.) — Moist thickets, New York to Illinois 

 and Kentucky. June. 



8. S. p&rvula, 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 so, slightly heart-shaped (j'-f long). ( S. ambigua, Nutt.) — 

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



*■ •*- Corolla (| ; - 1' long), with a slender tube : lower lip large and rather longer than 



the somewhat arched upper lip. 



9. S. galeiiculiffita, L. Smooth or a little downy, erect (1°- 2° high); 

 leaves ovate-lanceolate, acute, serrate, roundish and slightly heart-shaped at the 

 base (l'-2' long). — Wet shady places; common everywhere northward. 

 Aug. (Eu. ) 



* # # Flowers small (blue, 3" long), in axillary, and often also in terminal one-sided 

 racemes ; the lower floral leaves like the others, the upper small and bract-like. 



10. S. 1 ate ri flora, L. Smooth; stem upright, much branched (l°-2° 

 high) ; leaves lanceolate-ovate or ovate-oblong, pointed, coarsely serrate, round- 

 ed at the base, petioled (2'-3' long). — Wet shaded places; common. Aug. 

 — A quack having formerly vaunted its virtues as a remedy for hydrophobia, 

 this species bears the name of Mad-dog Skullcap. 



27. MARBIIBIUM, L. Horehound. 



Calyx tubular, 5- 10-nervcd, nearly equally 5- 10-toothcd ; the teeth more or 

 less spiny-pointed and spreading at maturity. Upper lip of the corolla erect, 

 notched ; the lower spreading, 3-cIeft, its middle lobe broadest. Stamens 4, 

 included in the tube of the corolla. Nutlets not truncate. — Whitish-woolly bitter- 

 aromatic perennials, branched at the base, with rugose and crenate or cut leaves, 

 and many-flowered axillary whorls. (A name of Pliny, said to be derived from 

 the Hebrew mar rob, a bitter juice.) 



1. M. vclgare, L. (Common Horehound.) Stems ascending; leaves 

 round-ovate, petioled, eremite-toothed ; whorls capitate; calyx with 10 recurved 



