LABiAT.E. (mint family.) 327 



— Swamps, South Carolina, and northward. Jane - Aug. — Stem 1 1° - 2° high. 

 Leaves 2' -3' long./ Corolhi jnirplc. 



2. S. hyssopifolia, Mic-lix. Smooth or nearly so; stem crcet, slender; 

 leaves sessile, laneeolate or linear, chtusc, entire or sparingly serrate ; raceme 

 short, of few 4 -G flowered whorls; calyx smooth, with sjiiny spreading teeth, 

 J- J as long as the smooth violet corolla. — Wet pine barrcin, in the middle 

 districts of South Carolina, and northward. June - Aug. — Stem 1° - 1^° high. 

 Leaves 1 ' - 2' long. 



* * Annual. 



3. S. Ploridana, Slinttl. Smooth or hirsute ; stem slender, erect ; leaves 

 lanceolate or oblong, j)etioled, or the upper ones sessile, acute or obtuse, serrate, 

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

 6-10-flowered ; calyx pubescent, with lanceolate-subulate rigid tectli ; corolla 

 twice as long as the calyx, purple. (S. annua, Walt. ?) — Low grounds, Jliddle 

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

 shorter than the peiiolc. 



28. ISANTHUS, Miehx, 



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

 Stamens 4, incurved-ascending, cxserted : anthers 2-celled. Ku;lcts obovoid, 

 imprcsscd-rcticulated, laterally cohering at the base. — An annu;il pubescent 

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

 acute leaves, and small pale blue flowers, on 1 -3-flowered axilhuy jjcdunclcs. 



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

 Stem terete, 1° -\^° high. Leaves 1'- Ij' long, 3-nerved below tlic middle. 



29. TRICHOSTEMA, L. Blue-Curi.s. 



Calyx short, reversed, oblique, 5-toothcd ; the 3 lower tcctli long, connate ; 

 the 2 upper ones very short. Corolla slender, nearly equally .'i-clefi. Stamens 

 4, long-cxserted, partly coiled : anther-cells diverging. Nutlets ])itted, united 

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

 on lateral peduncles. 



I. T. diclaotomuin, L. Pubescent and somewhat viscid, or nearly 

 smooth ; stem mueli branched, obscurely 4-anglcd ; leaves oblong or lanceolate, 

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

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

 Sept — Stem 1° - 2° high. 



30. TEUCRIUM, L. GERMAXDEn. 



Calyx tubular or l)ell-shapcd, 5-toothed. Corolla 5-lobcd ; the 4 u])per lobes 

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

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

 anther-cells confluent. Nutlets rugose. 



