142 Trans. Acad. Sci. of St. Louis. 



Euphorbia corollata, L. A slender black vertical root 

 surmounted by one or more caudices. Prairie. 



Humulus Lupulus, L. Crown supported by a rather 

 strong root. Thickets. 



Urtica gracilis, Ait. Rhizomes. Low ground. 



Laportea Canadensis, Gaud. Extensive tender white 

 rhizomes about the size of the stems. Low woods. 



Boehmeria cylindrica, Willd. A matted crown of stem 

 bases. Rhizomes are formed which soon become upright 

 >tems. Low ground. 



Following are a few additional notes on Compositae* : — 



Hymenopappus corymbosus, Torr. & Gray. This is bien- 

 nial instead of perennial as stated in Article I. 



Senecio aureus, L. var. Balsamitae, Torr. & Gray. A small 

 caudex. Stony hills. 



Cacalia atriplicifolia,\j. Slowly creeping rhizome. Woods. 



Oacalia tuberosa, Nutt. A caudex with fascicled roots. 

 Low prairie. 



Hieracium longipilum, Torr. Perennial by basal buds 

 which produce rosettes in the fall or spring. Prairie. 



Issued April 3, 1900. 



* See Traus. Acad. Sci. of St. Louis. 9:1. 



