158 VERBENACEAE 



6. ONOSMODIUM Michx. FALSE GROMWKLL. 

 Flowers greenish-white in elongated, leafy racemes : corolla tubular, 

 not appendaged, its lohes acute : nutlets smooth, bony. 



Plant green or greenish-yellow. 1. 0. Carolinianum. 



Plant grayish-green. 2. 0. molle. 



1. O. Carolinianum (Lam.) DC. 2-4 high, very rough-pubes- 

 cent : leaves oblong-lanceolate, acute : nutlets \\' f long, ovoid-globose. 

 Frequent throughout in dry ground. June-July. 



2. O. molle Michx. l-2 high, grayish, less pubescent : leaves ovate- 

 lanceolate, acute : nutlets 2" long, ovoid. Frequent on prairies through- 

 out the southern part. May-June. 



7. SYMPHYTUM L. 



Rough-hairy perennials with flowers in raceme-like clusters. Corolla 

 tubular, inflated, its lobes obtusish. Scar left by nut broad, concave, 

 toothed. 



1. S. officinale L. COMFREY. 2-3 high: leaves ovate-lanceolate, 

 decurrent on the stem : corolla yellowish-white, 8" long Sparingly 

 escaped from cultivation at Independence. June-July. 



8. ECHIUM L. 



Bristly-hairy herbs with flowers in leafy -bracted spikes. Corolla tubu- 

 lar-funnel-form, its limb with unequally spreading lobes. Styles and 

 stamens exserted. 



1. E. vulgare L. BLUEWEED. l-3 high : leaves oblong to linear- 

 lanceolate, sessile : flowers reddish-blue, nearly V long. Rarely adven- 

 tized along railroads near Sheffield and Lee's Summit. June-August. 



FAMILY 107. VERBENACEAE J. St. Hil. 



Herbs with opposite leaves and perfect flowers. Divisions of calyx and 

 corolla five each. Stamens four, didynamous, alternate with the corolla 

 lobes. Ovary superior, 2-4-celled, each cell 1-ovuled, separating at ma- 

 turity into 2-4 indehiscent nutlets. Style one. Stigmas one or two. 



Nutlets four. 1. VERBENA. 



Nutlets two. 2. PHYLA. 



1. VERBENA L. VERVAIN. 



Flowers in spikes, bracted. Corolla somewhat irregular, its limb 5- 

 lobed. Ours are perennials. Many hybrids occur. 



Plants strictly erect. 

 Leaves distinctly petioled. 



Flowers white. 1. V. urticaefolia. 



Flowers blue. 2. V. hastata. 



Leaves sessile. 



Leaves linear to lanceolate. 3. V. angustifolia. 



Leaves ovate to oblong. 4. V. stricta. 



