Trichostema. LABIATE. 347 



erect and narrow, 2-lobed ; lower spreading, o-cleft. Anther-cells more or less confluent. 

 Nutlets ovoid, smooth, obtuse. Leaves rugose. 



•^ -)— Stamens ascending under the galeate upper lip of the corolla. 

 ++ Introduced and naturalized from the Old World : stamens not deflexed after anthesis. 



44. BALLOTA. Calyx funnelform-dilated at the throat or border, 10-nerved, 5-tootiied in 

 ours. Corolla nearly as in Stuchijs. Filaments not appendaged. 



45. PHLOMIS. Calyx tubular, 5-10-nerved, 5-tootlied in ours. Upper lip of the corolla 

 strongly galeate ; the lower spreading, 3-cleft. Upper pair of stamens (in our species 

 rather longer) f urnislied with a subulate or liooked appendage at base ! 



46. LEONOTIS. Calyx tubular, 10-nerved, at length incurved above, oblique at the 

 orifice, and with 5 or more unequal spinulose-tipped teeth, tlie upper one largest. Corolla 

 slender ; the upper lip erect or incurved and elongated, entire ; lower sliort and spreading, 

 3-cleft, its middle lobe not larger. Filaments not appendaged at base : antliers approxi- 

 mate in i)airs. Upper fork of the style very short. Flowers densely capitate-verticil- 

 lastrate. 



47. LEONURUS. Calyx turbinate, 5-nerved, with nearly equal truncate orifice, and 5 

 rigid and at length spreading subulate-spinescent teeth. Corolla sliort ; upper lip oblong, 

 entire. F'ilaments not appendaged: anther-cells parallel or sometimes divergent; valves 

 naked. Nutlets smooth, truncate at apex. Leaves cleft or incised, veiny, all longer than 

 tlie cai)itate-verticillastrate flowers. 



48. LAMIUM. Calyx tubular- or turbinate-campanulate, somewhat 5-nerved, commonly 

 oblique at tiie orifice ; tlie 5 teeth subulate but not spinescent. Corolla dilated at the 

 throat ; upper lip ovate or oblong, fornicate, narrowed at base ; lower lip spreading, its 

 lateral lobes truncate down to tlie throat, or sometimes oblong, and with or without a 

 tootii-like appendage ; middle one broad, emarginate, contracted and as it were stipitate 

 at base. Filaments not appendaged : anthers approximate in pairs ; their cells oblong, 

 divaricate, sometimes hairy ; valves not ciliate. Nutlets truncate at the apex. Leaves 

 mostly cordate. 



49. GALEOPSIS. Hesembles Lnniiuni in habit and StacJii/s generally in flowers. But 

 anthers transversely 2-valved ; the inner valve of each cell hirsute-ciliate, the outer and 

 larger one naked. 



■H- ++ Lidigenous (chiefly) : stamens all or the lower pair sometimes deflexed to the sides 

 of the throat or contorted after anthesis. 



50. STACHYS. Calyx tubular-campanulate or turbinate, 5-10-nerved, equally 5-tootlied, 

 sometimes the upper teeth larger and more or less united. Corolla with cylindrical or 

 cylindraceous tube, not dilated at tlie throat ; upper lip erect, more or less fornicate or 

 concave, sometimes rather thrown back, entire or emarginate ; lower spreading, •>lobed, 

 its middle lobe larger. Filaments naked : anthers approximate in pairs ; the cells either 

 parallel or divergent. Nutlets obtuse at the apex, not truncate. 



1. TETRACLEA, Gray. (From reroa, four, and xlsi'co, to close, referring 

 to the four distinct or closed nutlets of the fruit : first described as a Verbenaceous 

 genus.) — Single species. 



T. Coiilteri, Gray. Herb a foot or more high from a perennial root or suffrutescent base, 

 minutely puberulent : leaves petioled, ovate, nearly entire : flowers 2 or 3 on the sliort 

 axillary peduncles, short-pedicelled, cream-colored, in summer. — Am. Jour. Sci. ser. 2, xvi. 

 98; Torr. Bot. Mex. Bound. 134, t.41; Benth. & Hook. Gen. ii. 1220. —Rocky hills, S. W. 

 Texas to Arizona. (Adjacent Mex.) 



2. TRICHOSTEMA, Gronov. (Trichostemma of some.) Blue-Curls. 

 (From dfji'^, hair, and oriji^a, for stamen, referring to the capillary filaments.) — 

 Herbs or suffi-utescent plants, sweet-aromatic or strong-scented, mostly low ; with 

 entire leaves, and commonly blue or violet corolla and stamens : fl. summer : all 

 belonging to the U. S. 



§ 1. Calyx very oblique and bilabiate ; its 3 upper divisions twice or thrice the 

 length of the lower two and united to above the middle : tube of the corolla 

 shorter than the limb : flowers loose, 1 to 3 on slender bibracteate peduncles, or 

 scattered on paniculate branches ; the alar ones, becoming lateral and secund or 



