PLANTS OF IOWA 217 



MARTYNLACE-ffi. UNICORN-PLANT FAMILY. 



MARTYNIA, L. 



2815. M. louisiana, Mill. Unicorn-plant. 

 In waste places ; south. 



ACANTHACE.E. ANACANTHUS FAMILY. 

 EUELLIA, L. 



2816. R. strepens, L. Smooth Reullia. 

 In dry woods. 



2817. R. ciliosa, Pursh. Hairy Ruellia. 

 Dry soils; frequent. 



DlANTHERA, L. 



2818. D. americana, L. Dense-flowered Waterwillow. 

 In wet places. 



PHEYMACE^I. LOPSEED FAMILY. 

 PHRYMA, L. 



2819. P. leptostachya, L. Lopseed. 



Common in upland woods, and in thickets. 



PLANTAGINACE^E. PLANTAIN FAMILY. 

 PLANTAGO, L. 



2820. P. major, L. Common Plantain. 

 Common ; introduced weed from Europe. 



2821. P. rugeUi, Dec. Bugel's Plantain. 

 In waste ground; common. 



2822. P. lanceolata, L. Eib-grass. 

 Introduced from Europe; not infrequent. 



2823. P. purshii, R. & S. Pursh 's Plantain. 

 Dry prairies ; westward. 



2824. P. aristata, Michx. Large-bracted Plantain. 

 Dry prairies. 



2825. P. virginica, L. Dwarf Plantain. 

 Sandy soil. 



RUBIACE^:. MADDER FAMILY. 

 HOUSTONIA, L. 



2826. H. minima, Beck. Least Bluets. 

 Dry sandy soil; common. 



