AX ARTIFICIAL PRAIRIE 



39 



The fact that prairie plants are essentially xerophytes is well 

 established, and explains the possibility of their continued ex- 

 istence in exposed situations. That exposure brought about 

 artificially should result in the development of this xerophytic 

 flora in a narrow strip extending through a deep forest seems 

 especially worthy of note, and further confirms the previous 

 conclusion that exposure is the primary cause of the existence of 

 treeless prairies. So long as this strip is kept clear of shrubs 

 and trees it will continue to produce a prairie flora. If neglected 

 much of it will probably revert to forest, though it is very prob- 

 able that where the prairie turf has become well established it 

 would resist the advance of the forest. 



The following lists of plants give a comparative view of the 

 floras of the prairie strip and the adjacent forest. The lists are 

 based on manv collections made at various times. 



Prairie Plants 

 Dicotyledones 



Achillea millefolium L. 

 Ambrosia artemisiifolia L. 

 Amorpha canescens Pursh 

 Anemone cylindrica Gray 

 Antennaria plantaginifolia (L.) 



Rich. 

 Artemisia eaudata Miehx. 

 Asclepias syriaca L. 

 Asclepias tuber osa L. 

 Asclepias verticillata L. 

 Aster laevis L. 



Aster multiflorus exiguus Fern. 

 Baptisia leucantha T. & G. 

 Brauneria pallida (Xutt.) Britt. 

 Cassia chamaeerisia L. 

 Ceanothus americanus L. 

 Cirsium discolor (Muhl.) Spreng. 

 Coreopsis palmata Nutt. 

 Desmodium cana dense (L.) DC. 

 Erigeron ramosus (Walt.) BSP. 

 Euphorbia corollata L. 

 *Fragaria virginiana Duches. 

 *Gentiana flavida Gray 

 Helianthemum majus BSP. 

 Helianthus scaberrimus Ell. 



Heuchera hispida Pursh 

 Hypericum cistifolium Lam. 

 Krigia amplexicaulis Nutt. 

 Kuhnia eupatoroides corymbulosa 



T. & G. 

 Lactuca canadensis L. 

 Lepachys pinnata (Vent.) T. & G. 

 Lespedeza capitata Michx. 

 Liatris pycnostachya Michx. 

 Liatris scariosa Willd. 

 Linum sulcatum Rid. 

 Lithospermum canescens (Michx.) 



Lam. 

 Lobelia spicata Lam. 

 Monarda mollis L. 

 Oenothera serrulata Xutt. 

 Parthenium integrifoliuni L. 

 Phlox pilosa L. 

 Physalis pubescens L. 

 *Potentilla canadensis L. 

 Pycnanthemum flexuosum (Walt.) 



BSP. 

 *Rhus glabra L. 

 Rudbeckia hirta L. 

 Ruellia ciliosa Pursh 



