158 VERBENACEAE 



6. ONOSMODIUM Michx. False Gromwell. 

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

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



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



Plant grayish-green. 2. 0. molle. 



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

 cent : leaves oblong-lanceolate, acute : nutlets IV^ 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. ofiBcinale 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. 1°-3° high : leaves oblong to linear- 

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

 tized along railroads near Sheflield 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- uriicacfolia. 



Flowers blue. 2. I', hus/nta. 



Leaves sessile. 



Leaves linear to lanceolate. 3. V. nnqusti folia. 



Leaves ovate to oblong. 4. ]'. strictn. 



