422 LABIATE. (mint FAMILY.) 



* * Root perennial ; stem erect, 

 •i- Leaves ohscurehj or not at all cordate, sessile or short-pet loled. 



1. S. hyssopifdlia, Michx. Smooth and glabrous, ov the. noi\e?,h\rs,\\ie\ 

 stems slender (1° high); leaves linear-ohlong or narrowly linear, sessile, ob- 

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

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

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

 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-angled (2-3° high), leafy, hirsute icith 

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

 \ov,^v short-petioled, oblong- or ovate-lanceolate, crenatehj serrate, rounded at 

 base, downy or hairy-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 interrupted 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, NeAvf. to Penn., westward across the continent. 



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

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

 last, but nearly all distinctly petioled, the lower floral as long as the floAvers; 

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

 rather narrower and the teeth more awl-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 feAV 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. 



-t- -t- Nearly all the leaves long-petioled and cordate. 



4. S. COrdata, Riddell. Rather Aveak, hirsute, 2-3° high; lea\-es all 

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

 minute; spikes slender, of numerous fe\A^-floA\-ered clusters; calyx only 2" 

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

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

 and Mo. 



Order 83. PLANTAGINACE^E. (Plantain Family.) 



Chiefly stemless herbs, icifh regular 4-merous spiked floicerSy the stamens 

 inserted on the tube of the dry ajid membranaceous veinless monopetalous 

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

 genera. 



1. PLANTAGO, Tourn. Plaxtaix. Ribavort. 



Calyx of 4 imbricated persistent sepals, mostly Avith dry membranaceous 

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

 parted. Stamens 4, or rarely 2, in all or some floAvers Avith long and Aveak 



