LABIATE. (mint FAMILY.) 419 



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

 ered clusters of flowers sessile in the axils of round anl brait-like membra- 

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

 from the German braane, a disease of the throat, for which this j^l^nt was a 

 reputed remedy.) 



1. B. vulgaris, L. (Commox Self-heal or Heal-all.) Leaves ovate- 

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

 color, rarely white) not twice the length of the purplish calyx — AV()(^(ls and 

 fields, Newf. to Fla., westward across the continent. Juue-Se]<t. (Ku.) 



27. PHYSOSTEGIA, Beuth. 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-lip])ed ; 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 upriglit wand-like stems, and 

 sessile lanceolate or oblong mostly serrate leaves. Flowers lai-ge and showy, 

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

 panicled terminal leafless is'pikes. (Name from (pvaa, a bladder, and crTeyr], 

 a covering.) 



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

 virgate or several panicled spikes; leaves thickish ; cali/x tubular-canipanidate, 

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

 west and southward. Varies greatly. — Var. dexticulXta, 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, repaud-denticulate ; spikes JiliJ or m, rather remotely flowered ; 

 cah/x short and broadlg campanulate, its teeth about as long as the tube; corolla 

 5-6'' long, much dilated upivard. — Barrens, W. Ky. and Ark. to La. and Tex. 



28. SYNANDRA, Xutt. 



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

 4-toothed ! Corolla with a long tul)e, 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 avv, together, and avrfp, for anther). 



I. S. grandiflora, 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. MARRUBIUM, Tourn. Horehound. 



Cal\ x 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. 



