a 
LABIATJE. (MINT FAMILY.) 327 
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— Swamps, South Carolina, and northward. June- Aug.— Stem 1]? - 29 high. 
Leaves 2/—3!long. Corolla purple. 
2. S. hyssopifolia, Michx. Smooth or nearly so; stem erect, slender; 
leaves sessile, lanceolate or linear, obtuse, entire or spitingly serrate ; raceme 
short, of few 4-6-flowered whorls; calyx smooth, with spiny spreniit teeth, 
3-3 as long as the smooth violet corolla. — Wet pine barrens, in the middle 
districts of South Carolina, and northward. June - Aug. — Stem 19 - 13? high. 
Leaves 1! - 2! long. 
* * Annual. 
3. S. Floridana, Shuttl. Smooth or hirsute ; stem slender, erect ; leaves 
lanceolate or oblong, petioled, or the upper ones sessile, acute or obtuse, serrate, 
truncate, or the lowest subcordate at the base; whorls few or numerous, distant, 
6-10-flowered ; calyx pubescent, with lanceolate-subulate rigid teeth; corolla 
twice as long as the calyx, purple. (S. annua, Walt. ?) — Low grounds, Middle 
and South Florida. July. — Stem 10/—15' high. Leaves 1 —— 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-reticulated, 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. eceruleus, Michx.— Dry soil in the upper districts. July - Aug.— 
Stem terete, 19-13? high. Leaves 1/-14/ long, 3-nerved below the middle. 
29. TRICHOSTEMA, L. Brvur-Cumrs. 
Calyx short, reversed, oblique, 5-toothed ; the 3 lower teeth long, 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 19 — 2° high. ; 
30. TEUCRIUM, L. GrnMANDER. 
Calyx tubular or bell-shaped, 5-toothed. Corolla 5-lobed ; the 4 upper lobes | 
short, the lowest large, oblong or rounded, concave. Stamens 4, didyna 
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