312 LABIATJ2. (mint FAMILY.) 



• • Stamens long-cxserted, dldynamoas. 



29. TUICIIOSTEMA. Lobes of the corolla nearly equal. Calyx 5-clcfl. Flowers Folltary. 



30. TliUCUlL'M. Lower lobe of the corolla longest. Calyx 0-toothcd. Whorls crowded. 



1. OCIMUM, L. Basil. 



Calyx ovate or bcll-shapcd, 5-toothctl, angled, dcflcxcd in fruit ; the upper 

 tooth rounilisli, with the margins dccurrent. Corolla nearly equally 2-lipped ; 

 the upper lip 4-ekft ; tlic lower entire, flat. Stamens 4, didyuamous ; the lower 

 pair Ioniser, resting upon the lower lip of the corolla. Style 2-eleft at the apex. 

 Glands of the disk I -4. Nutlets smooth, ovoid or globular. — Ciiiefly tropical 

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



1. O. Campechianum, Miller. Stem branched, ))ubcscent, especially at 

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

 a slcndei pubescent petiole, paler and pubescent on tiie veins beneath, dotted ; 

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

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

 riorida. — Stem G'- 12' high. Leaves 1'- 2' long. Flowers purple. 



2. HYPTIS, Jacq. 



Calyx tubular, with 5 equal subulate teeth. Corolla 5-lobpd ; the four u]ipor 

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

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

 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 pcduncled, 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-toothcd. Corolla equally 4-lobed, the upper 

 lobe notched or entii'c. Stamens 4, equal, distant, straight : anther-cells parallel. 

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

 Whorls (in our species) approximate, fonuing a dense or interrupted terminnl 

 spike. 



1. M. viridis, L. Stem and leaves smooth; leaves ovatc-laneeolato, un- 

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

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

 Miclix.) — Damp soils. Introduced, and sjiaringly naturalized. July - Sept. — 

 Stem l°- 2" high. Flowers pale blue. 



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

 crcuatc, sessile, hoary beneath ; sj)ikes oblong, interrupted ; bracts lanceolate ; 



