PLANTS OF IOWA 163 



2101. A. hybridus, L. Slender Pigweed. 



Introduced from tropical America. Common weed. 



2102. A. kybridus paniculatus, (L.) Arline & Br. 

 Frequent in waste places. 



2103. A. grcecizans, L. Tumble Weed. 

 Common. 



2104. A. torreyi, (A. Gray) Reuth. Torrey's Amaranth. 

 Introduced from southwest. Frequent. 



ACNIDA, L. 



2105. A. tamariscina, (Nutt) Wood. Western Water Hemp. 

 In wet places. 



2106. A. tamariscina tuberculata, (Moq.) Uline & Bray. 

 River banks, frequent. 



FRCELICHIA, Moench. 



2107. F. floridana, (Nutt) Moq. Florida Fro3licha. 

 Dry sandy soil, frequent. 



PHYTOLACCACE-ffi. POKEWEED FAMILY. 



PHYTOLACCA* L. 



2108. P. decandra, L. Pokeweed. 

 Introduced, from Europe. 



NYCTAGINACE^E. FOUR O'CLOCK FAMILY. 



ALLIONIA. 



2109. A. nyctaginea, Michx. Wild Four O'clock. 

 Common in dry places. 



2110. A. hirsuta, Pursh. Hairy Umbrella-wort. 

 In dry soil. Infrequent. 



AIZOACE-ffi. CARPETWEED FAMILY. 

 MOLLUGO, L. 



2111. M. verticillata, L. Carpet Weed. 

 Common in sandy and waste grounds. 



PORTULACACE^:. PURSLANE FAMILY. 



TALINUM, Adams. 



2112. T. terctifolium, Flame Flower. 

 Not common. 



