422 LABIATE. (mint FAMILY.) 



* * Root perennial ; stem erect, 

 ■i- Leaves obscurely or not at all cordate, sessile or short-petioled 



1. S. hyssopifolia, Michx. Smooth and (jlahrons,ovt\\ii\\oi\e&\\\YS,\xte; 

 stems sleuder (1° liigh) ; leaves linear-oblong or nnrrowlij linear, sessile, ob- 

 scurely toothed toward the apex ; whorls 4 - 6-flowered, rather distant ; corolla 

 glabrous, twice or thrice the length of the triangular-awl-shaped spreading 

 calyx-teeth. — Wet sandy places, Mass. to Mich., south to Fla. and Mo. — Var. 

 AMBiGUA, Gray, is stouter (1-2° high), sometimes with scattered retrorse 

 bristles on the angles of the stem, and with broader (3-6") serrulate leaves. 

 ^111. and Ky. to Ga. 



2. S. palustris, L. Stem 4-augled (2-3° high), leafy, hirsute with 

 spreading or rejiexed hairs, especially on the angles; leaves sessile, or the 

 lower short-petioled, oblong- or ovate-lanceolate, crenately serrate, rounded at 

 base, downij or h air ij -pubescent, obtusish (2-4' long), the upper floral ones 

 shorter than the nearly sessile calyx ; whorls 6 - 10-flowered, the upper crow ed 

 into an iuterruptel spike; calyx hispid; the lance-subulate teeth somewhat 

 spiny, half the length of the corolla, diverging in fruit; upper lip of corolla 

 pubescent. — Wet ground, Kewf. to Penn., Avestward across the continent. 



3. S. aspera, Michx. Taller; stem more commonlij smooth on the sides, 

 the angles beset with stiff rejiexed bristles ; leaves hairy or smoothish, as in the 

 last, but nearli/ all distinctli; petiohd, the lower floral as long as the flowers ; 

 spike often slender and more interrupted; calyx mosily glabrous, the tube 

 rather narrower and the teetJi more aAvl-shaped and spiny; corolla glabrous 

 throughout. (S. palustris, var. aspera. Gray.) — Wet ground, common. 



Var. glabra, Gray. More slender, smooth and glabrous throughout, or 

 with few bristly hairs; leaves taper-pointed, more sharply toothed, mostly 

 rounded or truncate at the base, all more conspicuously petioled. (S. palustris. 

 var. glabra, Gray.) — Western N. Y. to 111., and southward 



-1- -^ Nearly all the leaves long-petioled and cordate. 



4. S. COrdata, Riddell. Rather weak, hirsute, 2-3° high; leaves all 

 ovate- or oblong-cordate, acuminate, crenate (2-5' long), the floral mostly 

 minute; spikes sleuder, of numerous few-flowered clusters; calyx only 2" 

 long; corolla glabrous throughout (or nearly so), barely .5" long. (S. palus- 

 tris, var. cordata. Gray.) — Thickets, S. Ohio to Iowa, south to Va., Tenn,. 

 and Mo. » 



Order 88. PLANTAGINACE^. (Plantaix Family.) 



Chiejiy stemless herbs., with regular 4-merous spiked flowers^ the stainens 

 inserted on the tube of the dry and membranaceous veinless monopetalotis 

 corolla, alternate with its lobes; — chiefly represented by the two following 

 genera. 



1. PLANTAGO, Tourn. Plantain. Ribwort. 



Calyx of 4 imbricated persistent sepals, mostly with dry membranaceous 

 margins. Corolla salver-form or rotate, withering on tlie pod, the border 4- 

 parted. Stamens 4, or rarely 2, in all or some flowers with long and weak 



