LABIATJE. (MINT FAMILY.) 327 



— Swamps, South Carolina, and northward. June- Aug. — Stem l7°-2° high. 

 Leaves 2' - 3' long. Corolla purple. 



2. S. hyssopifolia, Michx. Smooth or nearly so; stem erect, slender; 

 [eaves sessile, lanceolate or linear, ohtuse, entire or sparingly serrate ; raceme 

 short, of few 4 - 6 -flowered whorls ; calyx smooth, with spiny spreading teeth, 

 |-£ as long as the smooth violet corolla. — Wet pine barrens, in the middle 

 districts of South Carolina, and northward. June - Aug. — Stem l°-l£° high. 

 Leaves 1' -2' long. 



* * Annual. 



3. S. Floridana, Shuttl. Smooth or hirsute ; stem slender, erect ; leaves 

 lanceolate or oblong, petiolcd, or the upper ones sessile, acute or obtuse, serrate, 

 truncate, or the lowest subeordate at the base; whorls few or numerous, distant, 

 6 - 1 0-flowered ; calyx pubescent, with lanceolate-subulate rigid teeth; corolla 

 twice as long as the calyx, purple. (S. annua, Walt. ?) — Low ground^, Middle 

 and South Florida. July. — Stem 10'- 15' high. Leaves 1' long, the lowest 

 shorter than the petiole. 



28. ISANTHUS, Michx. 



Calyx bell-shaped, 10-nerved, 5-cleft. Corolla bell-shaped, equally 5-lobed. 

 Stamens 4, incurved-ascending, exserted : anthers 2-celled. Nutlets obovoid, 

 impressed-reticulatcd, laterally cohering at the base. — An annual pubescent 

 and somewhat viscid branching herb, with lanceolate entire or sparingly toothed 

 acute leaves, and small pale blue flowers, on 1 -3-flowered axillary peduncles. 



1. I. COeruleilS, Michx. — Dry soil in the upper districts. July- Aug. — 

 Stem terete, 1°- l£° high. Leaves 1'- 1^' long, 3-nerved below the middle. 



29. TRICHOSTEMA, L. Blue-Cuiu.*. 



Calyx short, reversed, oblique, 5-toothed ; the 3 lower teeth lonjr, connate ; 

 the 2 upper ones very short. Corolla slender, nearly equally 5-cleft. Stamens 

 4, long-exserted, partly coiled : anther-cells diverging. Nutlets pitted, united 

 at the base. — Branching annuals, with entire leaves, and solitary blue flowers 

 on lateral peduncles. 



1. T. dichotomum, L. Pubescent and somewhat viscid, or nearly 

 smooth ; stem much branched, obscurely 4 -angled ; leaves oblong or lanceolate, 

 obtuse, narrowed into a petiole. (T. lineare, Nutt. is a smoother form, with linear 

 leaves.) — Dry sandy soil, Florida to Mississippi, and northward. Aug. and 

 Sept. — Stem 1° - 2° high. 



30. TEUCRIUM, L. Gebxavdeb. 



Calyx tubular or bell-shaped, 5-toothcd. Corolla 5-lobed ; the 4 upper lobes 

 short, the lowest large, oblong or rounded, concave. Stamens 4, didvnamous, 

 the lowest pair longest, exserted between the 2 upper lobes of the corolla : 

 anther-cells confluent. Nutlets rugose. 



