PLANTS OF IOWA 215 



2788. V. serpylUfolia, L. Thyme-leaved Speedwell. 

 In thickets. 



2789. V. peregrina, L. Purslane Speedwell. 

 A common weed, in fields. 



2790. V. arvensis, Tj. Corn Speedwell. 

 An introduced weed. 



Leptandra, Nutt. 



2791. L. virginica, (L.) Nutt. Culver's Root. 

 Moist prairies, thickets and borders; common. 



Afzelia, J. G. Gmel. 



2792. A. macrophulla, (Nutt.) Kuntze. Mullen Foxglove. 

 In moist places. 



Dasystoma, Raf. 



2793. D. grandiflora, (Benth.) Wood. "Western False Fox- 



glove. 

 In dry woods. 



2794. D. flava, (L.) Wood. Downy False Foxglove. 

 Woods and thickets. 



Gerardia, L. 



2795. G. Mnifolia, Nutt. Flax-leaved Gerardia. 

 In moist ground. 



2796. G. aspera, Dougl. Rough Purple Gerardia. 

 Rare, on dry ridges. 



2797. G. purpurea, L. Large Purple Gerardia. 

 In moist places. Quite common. 



2798. G. paupercula, (A. Gray) Britton. Small-flow. 



Gerardia. 

 In low ground. 



2799. G. tenuifolia, Vahl. Slender Gerardia. 

 In dry woods. 



2800. G. besseyana, Britton. Bessey's Gerardia. 

 Dry prairies. 



2801. G. auriculata, Michx. Auricled Gerardia. 

 Castilleja, Mutis. 



2802. C. coccinea, (L.) Spreng. Scarlet Painted-cup. 

 In open thickets. 



