PLANTS OF IOWA 197 



KNEIFFIA, Spaeh. 



2547. K. fruticosa, (L.) Raimann. Common Sundrops. 

 Common. 



MERIOLIX, Raf . 



2548. M. serrulata, (Nutt.) Walp. Tooth-leaved Primrose. 

 In dry places. 



GAURA, L. 



2549. G. parviflora, Dougl. Small-flowered Gaura. 

 Not rare, in dry soils. 



2550. G. coccinea, Pursh. Scarlet Gaura. 

 Infrequent. 



2551. G. biennis, L. Biennial Gaura. 

 Dry soil. 



CIRCJEA, L. 



2552. C.lutetiana,~L. Enchanter 's Nightshade. 

 Common in deep woods. 



2553. C. alpina, L. Smaller Enchanter's Nightshade. 

 In deep woods. Not common. 



HALORAGIDACE-ffi. WATER-MILFOIL FAMILY. 



PROSERPINACA, L. 



2554. P. palustris, L. Mermaid-weed. 

 Not common ; in wet places. 



MYRIOPHYLLUM, L. 



2555. M. spicatum, L. Spiked Water-milfoil. 

 In ponds. 



2556. M. verticillatum, L. Whorled Water-milfoil. 

 Not common. 



2557. M. heterophyllum, Michx. Various-leaved Water- 



milfoil. 

 Infrequent. 



2558. M. pinnatum, (Walt.) B. S. P. Pinnate Water-milfoil. 

 Not infrequent. 



