260 BOTANICAL GAZETTE [APRIL 
2. The vegetation of the streams flowing through them con- 
sists of diatoms and the three sedges, Scirpus pungens Vahl., S. 
campestris Britton, and S. lacustris L. 
3. The three characteristic plants in and about the barren por- 
tion are Distichlis maritima Raf., Polygonum ramosissimum Michx. 
and Sueda diffusa Watson, of which the Sueda is by far the least 
abundant. 
4. The plants which may be regarded as successful invaders 
are the following: Jva ciliata Willd., Sporobolus heterolepis Gray, 
Sporobolus Texanus Vasey, Atriplex expansa Watson, Aster mulli- 
florus Ait., Ambrosia pstlostachya DC., and Hordeum jubatum L. 
Sporobolus Texanus Vasey has never been reported, I believe, 
beyond the southern part of Kansas. Its abundance in the 
_forthern tier of counties of Kansas extends its northern limit 
nearly two hundred miles. 
5- Among the less successful invaders which are quite com- 
annuus L., Enothera biennis L., Gaura parviflora Dougl., Elyms 
Virginicus L., and Spartina cynosuroides Willd. 
CoLumbus, Onto, : ‘ 
