312 LABIATE. (mint FAMILY.) 



* V stamens long-exserted, dldynamous. 



29. TRICHOSTEMA. Lobes of the corolla nearly equal. Calyx 5-clcft. Flowers nolltaiy. 



30. TEUCRIUM. Lower lobe of the corolla longest. Calyx 5-toothed. Whorls crowded. 



1. OCIMUM, L. Basil. 



Calyx ovate or bell-shaped, 5-toothcd, angled, deflexed in fruit; the upper 

 tooth roundish, with the margins decurrent. Corolla nearly equally 2-lipped ; 

 the upper lip 4-clcft ; the lower entire, flat. Stamens 4, didynamous ; the lower 

 pair longer, resting upon the lower lip of the corolla. Style 2-cleft at the apex. 

 Glands of the disk 1-4. Nutlets smooth, ovoid or globular. — Chiefly tropical 

 herbs or shrubs. Whorls 6-flowered, in a terminal bracted spike oi- raceme. 



1. O. Campechianum, Miller. Stem branched, pubescent, especially at 

 the joints ; leaves ovate and ovate-lanceolate, acute, finely serrate, narrowed into 

 a slendet pubescent petiole, paler and pubescent on the veins beneath, dotted ; 

 raceme many-flowered, pubescent; bracts ovate ; calyx hispid on the nei-ves, the 

 lower teeth awned ; corolla small, slightly exserted ; stamens smooth. — South 

 Florida. — Stem 6'- 12' high. Leaves 1'- 2' long. Flowers purple. 



2. HYPTIS, Jacq. 



Calyx tubular, with 5 equal subulate teeth. Corolla 5-lobed ; the four upper 

 lobes short, spreading or reflexed ; the lowest longer, saccate, abruptly deflexed, 

 thickened at the base. Stamens 4, didynamous, included in the bud in the 

 lower lobe of the corolla. Nutlets smooth, ovoid. 



1 . H. radiata, Willd. Herbaceous ; stem erect, mostly simple, pubescent 

 above ; leaves ovate-lanceolate, serrate or toothed, tapering into a petiole, 

 smooth ; heads peduncled, in the axils of the upper leaves, globose, surrounded 

 by an involucre of several lanceolate whitish bracts, pubescent ; corolla small, 

 white, dotted with purple. — Low ground, Florida to North Carolina, and west- 

 ward. July - Sept. — Stem 2° - 4° high. 



3. MENTHA, L. Mint. 



Calyx tubular, nearly equally 5-toothed. Corolla equally 4-lobed, the upper 

 lobe notched or entire. Stamens 4, equal, distant, straight : anther-cells parallel. 

 Style 2-cleft at the apex. Nutlets smooth, obtuse. — Pungent aromatic herbs. 

 Whorls (in our species) approximate, foiming a dense or Interrupted terminal 

 spike. 



1. M. viridis, L. Stem and leaves smooth; leaves ovate-lanceolate, un- 

 equally serrate, nearly sessile ; bracts leafy, and, like the calyx, smooth or hairy ; 

 spike cylindrical, interrupted below ; calyx-teeth linear-subulate. (M. tenuis, 

 Michx.) — Damp soils. Introduced, and sparingly naturalized. July - Sept. — 

 Stem 10-2° high. Flowers pale blue. 



2. M. rotundifolia, L. Soft-hairy; stem erect; leaves roundish, rugose, 

 crenate, sessile, hoary beneath ; spikes oblong, interrupted ; bracts lanceolate ; 



