312 LABIATJE. (MINT FAMILY.) 
+ * Stamens long-exserted, didynamous. ira 
29. TRICHOSTEMA. Lobes of the corolla nearly equal. Calyx 5-cleft. Flowers solitary. 
30. TEUCRIUM. Lower lobe of the corolla longest. Calyx 5-toothed. Whorls crowded. 
l. OCIMUM, L. Basix. 
Calyx ovate or bell-shaped, 5-toothed, angled, deflexed in fruit; the upper 
tooth roundish, with the margins decurrent. Corolla nearly equally. 2-lipped; 
the upper lip 4-cleft; 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 or raceme. 
1. O. Campechianum, Miller. Stem branched, pubescent, especially at 
the joints ; leaves ovate and ovate-lanceolate, acute, finely serrate, narrowed into 
a slender pubescent petiole, paler and pubescent on the 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 
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-uppet - 
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. WMixr. 
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, forming a dense or interrupted terminal 
1. M. viridis, L. Stem and leaves smooth; leaves ovate-lanceolate, an 
: equally. serrate, nearly sessile ; bracts leafy, and, like the calyx, smooth or Meri 
Spike eylindrical, interrupted below; ealyx-teeth limearsubulate. (Mtem — 
Miche.) — Damp soils. Introduced, and sparingly naturalized. July- Sept — - 
Stem 1°- 29 high. Flowers pale blue. Pau e 
~> M. rotundifolia, L. Soft-hairy; stem erect ; leaves roundish, rug0s®> 
