132 MISSOURL BOTANICAL GARDEN. 
duced by the cattle which graze over the mounds. (Wat- 
son No, 472.) 
LITHOSPERMUM CANESCENS (Michx.) Lehm. 
Common on the open parts of the mounds. (Watson 
No. 474.) 
LITHOSPERMUM ANGUSTIFOLIUM Michx. 
Common on the tops of all the mounds. (Watson No. 
473.) 
ONOSMODIUM MOLLE Michx. 
Common on the sides and along the backbones of the 
mounds. (Watson No. 475.) 
PENTSTEMON GRANDIFLORUS Nutt. 
Very common on the sides of the taller mounds, but not 
observed on the lower ones. (Watson No. 476.) 
GERARDIA ASPERA Doug]. 
Common on the tops and steep sides of the larger 
mounds. (Watson No. 479.) 
CaSTILLEJA SESSILIFLORA Pursh. 
Abundant on the sides of nearly allthe mounds. (Wat- 
son No. 481.) 
TEUCRIUM OCCIDENTALE A. Gray. 
Common down the sides of all the mounds, and spread- 
ing out into the bottom-prairie below, where it becomes 
abundant. Extends down the Missouri River to Holt 
County (Corning No. 482), where it is equally abundant, 
and to Jackson County (Courtney No. 485), where it is 
uncommon, and it has even been picked up in East Saint 
Louis by Eggert, but this last may have been introduced 
by means of hay with which it grew when cut. (Watson 
No. 483.) 
