LABIATieS. 105 



V 



YERBENACE^. 



CoToIU nearly equally B-lobed; calyx 5-toothed: small flowers in spikes 1 



C!oroUa bilabiate, 4-lobed: calyx 2-cleft: small heads on slender peduncles ,... 9 



1. VERBENA, Toumefort. 

 officinalis, L. Spikes filiform, bracts minute: leaves pinnatifid. 

 polystaehya, HBK. Leaves serrate: corolla a line broad. Rare, 

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

 prostata, R. Br. Diffiiae, spreading, hairy: corolla 2 lines broad, 

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



2. IiIPFIA, Linnans. 

 Xk nodiflora, Michx. Creeping: peduncles 1-4 in. long: flowers rose to white. 



labiatj:. 



( I. stamens 4, coiled in the bnd, much exserted throngh a cleft in the upper lip: leaves 



entire: corolla and curved filaments blue or purple 1 



I 2. Stamens erect or ascending, the posterior pair shorter or wanting: antber-cclU 

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

 m No. 9). 

 " Corolla smaU, almost equally 4-lobed: oiciUary flowers in denie v>horl-lVcechuiert,tMupp» 



axils flowerless. 



Stamens 4, nearly equal, all perfect: calyx 5 toothed 2 



Stamens 2, with anthers, posterior pair sterile or wanting 3 



* " 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 exserted 8 



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



Flowers small, white or purple: not J in. long , 6 



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 9 



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



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

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

 heads or globose whorls (except sp. S ol sno. I-ei. 

 CDcnective versatile upon the short filament. Leaviis pmnatifid 11 



