LABIATES. (MINT FAMILY.) 419 



their cells diverging. Low perennials, with nearly simple stems, and 3-flow- 

 ered clusters of flowers sessile in the axils of round and bract-like membra- 

 naceous floral leaves, imbricated in a close spike or head. (Name said to be 

 from the German braune, a disease of the throat, for which this plant was a 

 reputed remedy.) 



1. B. vulgaris, L. (COMMON SELF-HEAL or HEAL-ALL.) Leaves ovate- 

 oblong, entire or toothed, petioled, hairy or smoothish ; corolla (violet or flesh- 

 color, rarely white) not twice the length of the purplish calyx,. Woods and 

 fields, Newf. to Fla., westward across the continent. June -Sept. (Eu.) 



27. PHYSOSTEGIA, Benth. FALSE DRAGON-HEAD. 



Calyx nearly equally 5-toothed, obscurely 10-nerved, short-tubular or bell- 

 shaped, more or less enlarged and slightly inflated in fruit. Corolla funnel- 

 form, with a much inflated throat, 2-lipped ; upper lip erect, nearly entire ; 

 the lower 3-parted, spreading, small, its middle lobe larger, broad and rounded, 

 notched. Stamens 4, ascending under the upper lip ; anthers approximate ; 

 the cells parallel. Smooth perennials, with upright wand-like stems, and 

 sessile lanceolate or oblong mostly serrate leaves. Flowers large and showy, 

 rose or flesh-color variegated with purple, opposite, crowded in simple or 

 panicled terminal leafless spikes. (Name from <pv<ra, a bladder , and ffrsyi), 

 a covering.) 



1 . P. Virginiana, Benth. Stem 1-4 high, terminated by a simple 

 virgate or several panicled spikes ; leaves thickish ; calyx tubular-campanulate, 

 its teeth half the length of the tube; corolla V long. Wet grounds, from N. Vt. 

 west and southward. Varies greatly. Var. DENTICULA.TA, Gray. Slender 

 and commonly low, with crenulate-denticulate or obscurely serrate leaves, and 

 slender or loosely-flowered spikes. Middle Atlantic States. 



2. P. intermedia, Gray. Slender, 1-3 high, remotely leaved ; leaves 

 linear-lanceolate, repand-denticulate ; spikes filiform, rather remotely flowered ; 

 calyx short and broadly campanulate, its teeth about as long as the tube ; corolla 

 5 - 6" long, much dilated upward. Barrens, W. Ky. and Ark. to La. and Tex, 



28. SYNANDKA, Nutt. 



Calyx bell-shaped, inflated, membranaceous, irregularly veiny, almost equally 

 4-toothed ! Corolla with a long tube, much expanded above and at the throat ; 

 the upper lip slightly arched, entire, the lower spreading and 3-cleft, with ovate 

 lobes, the middle one broadest and notched at the end. Stamens 4, ascending ; 

 filaments hairy ; anthers approximate in pairs under the upper lip ; the two 

 upper each with one fertile and one smaller sterile cell, the latter cells cohering 

 together (whence the name; from <ri5/, together, and dvyp, for anther). 



1. S. grandifl6ra, Nutt. Hairy biennial, 1 high; lower leaves long- 

 petioled, broadly ovate, heart-shaped, crenate, thin, the floral sessile, gradually 

 reduced to bracts, each with a single sessile flower ; corolla 1|' long, yellowish- 

 white. Shady banks of streams, S. Ohio to 111. and Tenn. In spring. 



29. MARRTJBIUM, Tourn. 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, 



