LABIATE. (MINT FAMILY.) 315 



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

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

 York to Michigan and southward. June -Aug. 



6. S. iiltesn'ifoliil, L- Downy all over with a minute hoariness ; stenvcom- 

 monly simple ( 1 - 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, &c. from. Bridge water, 

 Mass. (Mr. 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 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. nervdsa, Pursh. Smooth, simple or branched, slender (10'- 20* 

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

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

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

 and Kentucky. June. 



8. S. parvilla, 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 (^'-|' long). (S. ambigua, Nutt.) 

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



-a- Corolla ( ' I' long), with a slender tube : lower lip large and ratlter longer tiian 

 the somewhat arched upper Up. 



9. S. galeiic lllata, L. Smooth or a little downy, erect (l-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. lateriflora, L. Smooth; stem upright, much branched (l-2 

 high) ; leaves lanceolate-ovate or ovate-oblong, pointed, coarsely sen-ate, 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. MARRUBIUM, L. HOREHOUND. 



Calyx tubular, 5- 10-nerved, nearly equally 5 - 10-toothed ; the teeth more or 

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

 notched; the lower spreading, 3-cleft, 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 marrob, a bitter juice.) 



1. M. vuLoXRE, L. (COMMON HOREHOUXD.) Stems ascending; leaves 

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



