99 ^ 



43a. Upper leaves closely sessile (flowers red-purple) 



Dead Nettle, Lamium amplexicaule. 



43b. Leaves all petioled 44. 



44a. Flowers red or purple Bead Nettle, Lamium maculatum. 

 44b. Flowers white Dead Nettle, Lamium album. 



45a. Flowers 2 2.5 cm. long, in loose terminal spikes (5 10 dm. 

 tall; flowers rose-color) 



False Drag-on Head, Physostegla virginiana. 



45b. Flowers 1 2 cm. long, in axillary and terminal spiked whorls 

 46. 



46a. Calyx-teeth spiny pointed (flowers pink or pale-purple) 



(Hemp Nettle) 47^ 

 46b. Calyx-teeth acute to awl-shape, but not spiny (3 10 dm. 



high; flowers pale-purple) (Hedge Nettle) 48. 



47a. Leaves ovate (3 8 dm. high) 



Hemp Nettle, Galeopsis tetrahit. 



47b. Leaves linear to lanceolate (1 4 dm. high) 



Hemp Nettle, Galeopsis ladanum. 



48a. Leaves glabrous 49. 



48b. Leaves distinctly pubescent 50. 



49a. Leaves ovate-lanceolate, serrate 



Hedg-e Nettle, Stachys tenuifolia. 

 49b. Leaves linear-oblong, entire or nearly so 



Hedg-e Nettle, Stachys hyssopifolia. 



50a. Stem pubescent on the angles alone; leaves petioled 



Hedge Nettle, Stachys tenuifolia van aspera. 



50b. Stem pubescent on both sides and angles; leaves nearly 

 sessile 51. 



51a. Leaves oblong or oblong-lanceolate, more than 1 cm. wide 



Hedgie Nettle, Stachys palustris. 

 51b. Leaves linear-lanceolate, 1 cm. wide or le&s 



Hedge Nettle, Stachys arenicola. 



VEKBENACEAE, the Verbena Family 



Herbs, with simple opposite leaves and slightly irregular flowers 

 in spikes or heads; petals 5, united and bearing the 4 stamens in the 

 corolla-tube; ovary 1, 2-celled or 4-celled, with 1 style. 



la. Plants prostrate or spreading 2. 



Ib. Plants erect (flowers in summer) (Vervain) 3. 



2a. Leaves serrate; flowers in short dense spikes (flowers pale- 

 blue, summer) Fog- Fruit, Lippia lanceolate. 



2b. Leaves pinnatifid; flowers in loose bracted spikes (flowers 

 light-purple, summer) Vervain, Verbena bracteosa. 



