5H TRANS. ST. LOUIS ACAD. SCIENCE. 



P. Rugelii, Decaisne in DC. Prod, xiii.l. 

 Moi>t places; common. 



Often growing with P. major, which it much resembles, though much more com- 

 mon ; but preferring moister soil, as lowland woods, where this species alone is 

 found. Leaves dark green, thin and smooth, in damp soil often very large and re- 

 motely denticulate ; base of petiole purple; spikes a foot or more in height, with 

 the apex attenuated and sometimes branched; capsules acutish, with line of dehis- 

 cence hidden by the calyx. This species certainly seems to be indigenous. 



P. lanceolata, L. Spec. 



Specimens have been occasionally collected by students, but I have none in my 

 herbarium. 



Nl'C TA GINA CEjE. 



Oxybaphus nyctagineus, (Michx.) Sweet, Hort. Brit. 1827.— 

 Allionia nyctagiyiea, Michx. Fl. 

 Gravelly banks: frequent. 



1\ 1 R ONI CHL 1 CEJE. 



Anychia Canadensis, (L.) B. B. P. Cat. — Qiteria Canadensis, L. 

 Spec. — A. capillacea, DC. Prod. iii. 

 Open woods; frequent. 



See note on this species by Britton, Torr. Bull. xiii. 1SS5. 

 AMARANTACEJE. 



Amarantus betroflexus, L. Spec. 



Cultivated ground ; common. 

 A. albus, L. Spec. 2d ed. (Syst. Nat. 10th eel. ex Richter). 



Cultivated ground; frequent. 



Most abundant in newly broken sod, when the larger specimens become "tumble 

 weeds." 



A. blitoides, Wats. Proe. Amer. Acad. xii. 1876. 



Dry open ground; abundant. 

 Acnida tuberculata, Moq. iii DC. Prod. xiii. 2. 



Low ground ; abundant. 



CHEH OP OD1A CEAS, 



CHENOPODITJM BOSCIANUM, Moq. Cheuop. Enum. 1840. 

 Shady places; common. 



C. album, L. Spec. 



Cultivated ground ; common. 

 C. urbicum, L. Spec. 



Waste places; infrequent. 

 C. HYBRIDUM, L. Spec. 



Woods; infrequent. 

 ( '. Botrys, L. Spec. 



A few specimens collected along the railroad near Ames in 1SS4. 

 POLTGONACE.E. 



RUMEX A.LTI8SIMUS, Wood, CI. -B. 2d ed. 18 17. 



Low ground; common. 



