MICHIGAN WEEDS. 



397 



Fig. 175 (154). 



Nettle-leaved Vervain. Verbena urticaefolia L. Perennial, usually pubescent, 

 stem erect, four-sided; 90-150 cm. high; leaves ovate, or oblong-ovate, coarsely serrate; 

 spikes narrow, interrupted, becoming, 10-15 cm. long; flowers very small, white. Na- 

 tive to low land, hybridizing with Verbena hastata, V. bracteosa, V. slricta. 



