PLANTS OF IOWA 159 



BOEHMERIA, Jacq. 



2040. B. cylindrica, (L.) Willd. False Nettle. 

 Moist shady places; common. 



SANTALACE^. SANDAL WOOD FAMILY. 



COMANDRA, Nutt. 



2041. C. umbellata, (L.) Nutt. Bastard Toadflax. 

 Common on dry hills and prairies. 



ARISTOLOCHIACE^I. BIETHWOET FAMILY. 

 ASARUM, L. 



2042. A. acuminatum, (Ashe.) Bick. Longtipped Wild 



Ginger. 

 Common on shady mossy (rocky) banks. 



2043. A. reflexum, Bick. Short-lobed Wild Ginger. 

 Common in alluvial woods. 



2044. A. canadensis, L. Wild Ginger. 

 Rich woods ; not rare. 



POLYGONACE.E. BUCKWHEAT FAMILY. 

 RUMEX, L. 



2045. R. acetosella, L. Sheep Sorrel. 

 Common in dry fields and waste places 



2046. R. salicifolius, Wein. Willow Leaved Dock. 

 Not Common. 



2047. R. verticillatus, L. Swamp Dock. 

 In moist places. 



2048. R. patientia, L. Patience Dock. 

 Common in waste places. 



2049. R. Iritanica, L. Great Water Dock. 

 Common in wet places. 



2050. R. occidentals, S. Wats. Western Dock. 

 Infrequent. 



2051. R. crispus, L. Curled Dock. 

 Introduced from Europe. Common. 



2052. R. sanguineus, L. Red Veined Dock. 

 Infrequent. 



