514 TRAXS. ST. LOUIS ACAD. SCIENCE. 



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

 Moist places; common. 



Often growing with P. major,\\\\\c\\ 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. 



NTC TA GINA CE^^. 



OxYBAPHUS NYCTAGiNEUS, (Miclix.) Sweet, Hort. Brit. 1827.— 

 Allionia nyctaginea^ Michx. Fl. 

 Gravelly banks ; frequent. 



PAR ONI CHI A CEM. 



Akychia Canadensis, (L.) B. S. P. Cat. — Queria Canadensis, L. 

 Spec. — A.capi'llacea, DC. Prod, iii. 

 Open woods; frequent. 



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

 AMARANTA CE.E. 



Amaranths retroflexus, L. Spec. 



Cultivated ground ; common. 

 A. albus, L, Spec. 2d ed. (Syst. Xat. lOth ed. ex Richter). 

 Cultivated ground; frequent. 



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

 weeds." 



A. BLITOIDES, Wats. Proc. Amer. Acad. xii. 1876. 



Dry open ground ; abundant. 

 ACNIDA TUBERCUEATA, Moq. ill DC. Prod. xiii. 2. 



Low ground; abundant. 



CHES O P ODIA CE.E. 



Chenopodium Boscianum, Moq. Cheuop. Euiini. 1840. 



Shady places; common. 

 C. ALBUM, L. Spec. 



Cultivated ground; common. 

 C. URBicuM, L. Spec. 



Waste places ; infrequent. 

 C. HYBRIDUM, L. Spec. 



Woods; infrequent. 

 C. Botrys, L. Spec. 



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

 POLrCONACE.E. 



RuMEX ALTissiMUS, Wood, Cl.-B. 2d ed. 1817. 

 Low ground ; common. 



