170 LABIATE. 



VERBENACEJB. 



Corolla nearly equally 5-lobed: calyx 5- toothed: small flowers in spikes 1 



Corolla bilabiate, 4-lobed: calyx 2- cleft: small heads on slender peduncles M .. fl 



1. VERBENA, Tournefort. 



1. V. offldnalia, L. Spikes filiform, bracts minute; leaves pinnatifid. 



2. V. polystachya, HBK. Leaves serrate: corolla a line broad. Rare. 



3. V. hastata, L. Erect, 3-6 ft high: leaves coarsely serrate, petioled. 



4. V. prostata, R. Br. Diffuse, spreading, hairy: corolla 2 lines broad. 



6. V. bracteosa, Michx. Similar, but rigid bracts exceeding smaller flowers. 



2. LIPPIA, Linnaus. 

 L I*, mxliflora, Michx. Creeping: peduncles 1-4 in. long: flowers rose to whit*. 



LABIATE. 



1. Stamens 4, coiled in the bud, much ex sorted through a cleft in the upper lip: leaves 



entire: corolla and curved filaments blue or purple 1 



9 2. Stamens erect or ascending, the posterior pair shorter or wanting: anther-cells 

 short, close together or united: upper lip of corolla not concave or hooded (except 

 in No. 9). 



' Ctxrx&i small, almost equally 4-lobed: axillary flowers in dense whorl-like cluster*, the vpptf 



axils flowerless. 



Stamens 4, nearly equal, all perfect: calyx 5 toothed 8 



Stamens 2, with anthers, posterior pair sterile or wanting. 8 



* * Corolla, bilabiate: stamens 4. 

 Flowers capitate: calyx equally 5- toothed: stamens distinct, straight. 



Upper lip of corolla entire or merely notched 4 



Upper lip 2-cleft: stamens exaerted 5 



Flowers solitary or in clusters, axillary: curved stamens all perfect. 



Flowers small, white or purple: not in. long / 



Flowers over an inch long, orange; peduncles bracteate 7 



Flowers in oblong heads or interrupted spikes, blue or purple 8 



Flowers in axillary clusters, rose and white: upper anthers imperfect 



Flowers with white or purplish corolla an inch long: stamens perfect 10 



g 3. Stamens 2, the upper pair rudimentary or wanting: anthers 1 -celled or with 2 cells 

 widely separated on the ends of a filament-like connective: flowers in dense terminal 

 heads or globose whorls (except sp. tf of JXo. it. 

 Oonnective versatile upon the short filament. Leaves pinnatifid 11 



