386 LABIATJE. (MINT FAMILY.) 



9. S. integrifolia, L. Softly pubescent ; stem simple or branching, 

 6' -2 high; leaves i'-H' long, obtuse, the lower ovate or cordate, cre- 

 nate, long-petioled, the upper lanceolate, mostly entire ; racemes leafy ; 

 corolla 8" -10" long, dilated upward, the ample lower lip longer than the 

 upper one. Low ground. May - July. 



i -t- -i- Leaven all linear and entire ; the lowest bract-like. 



10. S. Floridana, Chapm. Minutely pubescent ; stem slender, brauch- 

 iug ; leaves obtuse, sessile, with revolute margins ; the floral ones shorter than 

 the flowers ; racemes loose, few-flowered ; corolla large, much dilated at the 

 throat, the nearlv equal lips broad and obtuse ; filaments hairy at the base. 

 Pine barren swamps near the coast, West Florida. July. Stem 1 high. 

 Leaves 1' long, \" - \" wide. Corolla 1' long, deep blue, the lower lip white 



in the middle. 



* * Flowers small, in axillary racemes 



11. S. lateriflora, L. Smooth; stem elongated, diffusely branched; 

 leaves petioled, ovate-lanceolate, coarsely serrate, acuminate, the lower rounded 

 at the base ; racemes slender, 1-sided; corolla blue. Shady swamps. July- 

 Sept. Stein 2 -3 high. Leaves membrauaceous, 2' -3' long. Corolla 2" 



long. 



* * * Flowers solitary in the axils of the upper leaves. 



12. S. galericulata, L. Stem erect or ascending, simple or branched, 

 smooth or pubescent ; leaves short-petioled, ovate-lanceolate, acute, slightly 

 crenate, rounded or subcordate at the base, paler and pubescent beneath ; 

 flowers nearly sessile, turned to one side. Wet shaded places, North Caro- 

 lina, and northward. July -August. Stem l-2 high. Leaves I'-l^' 

 long Corolla 7" -8" long, blue, the lower lip white in the middle, spotted 

 with blue. 



13. S. parvula, Michx. Stem low, pubescent; leaves ovate or oblong, 

 obtuse, mostly entire, nearly sessile, strongly veined ; flowers small. Dry 

 ground. May - June. Fibres of the root often bearing small tubers. Stem 

 6' - 9' high. Leaves 4" - 6" long. Corolla blue, 2" - 3" long. 



14. S. nervosa, Pursh. Nearly glabrous ; stem slender, mostly simple, 

 the angles ncute, 1-1 high; leaves thin, obtuse, prominently nerved, the 

 lowest ovate, cordate, coarsely serrate ; the upper narrower and sessile ; flowers 

 small, blue; seed winged. Low shady woods, Tennessee, and northward. 

 July. 



23. MACBRIDEA, Ell. 



Calyx tubular-bell-shaped, 3-lobed ; the upper lobe lanceolate, entire, the 

 two lower ones oblong, notched or entire. Corolla inflated, 2-lipped ; the up- 

 per lip arching, concave, the lower broadly 3-lobed, spreading. Stamens 4 

 ascending under the upper lip. Filaments hairy : anthers approximate by 

 pairs, the cells diverging, hairy and denticulate on the margins. Nutlets 

 smooth. Erect mostly simple perennials. Flowers opposite, crowded in a 

 dense cone-like terminal head. Corolla large, white or purple. 



1. M. pulchra, Ell. Smooth or hairy; leaves lanceolate, acute, serru- 

 late, dotted; the lower ones narrowed into a petiole, the upper sessile, the 

 floral ones ovate, acute ; calyx striate, the lobes entire ; corolla purple, the 



