Interstitials : 

 Festuca octoflora (i) Linaria canadensis (4) 



Arabis lyrata Brigeron ramosiis (i) 



Oenothera rhombipetala (i) Ambrosia psilosfachya (9) 



Monarda punctata (3) 



The relative frequency of perennials and interstitials is 56 to 100. 



3. Oquawka area; a small tract of bunch-grass near the station 

 at Milroy. The dominant vegetation consists of four grasses, al- 

 most equally abundant: Koeleria cristata, Andropogon furcatus, 

 Boutclona curtipendula, and Boutcloua hirsuta. Four other grasses 

 are also present: Stipa spartea, Paniciun pseudopiibescens, Panicuin 

 Scribnerianuni, and Andropogon scopariiis. Other secondary species 

 are as follows. 



Perennials : 



Tradescantia reflexa Pcnfsfenion hirsiitits 



Tephrosia virgi]iiana Liatris scariosa 



Lcspedcza capitata Solid a go spcciosa, 

 Buphorbia coroUata var. angustata 



Rhus canadensis, var. Solidago neuwralis 



illinoensis Helianthus scaberrinnts 



Acerates viridiflora Coreopsis palniata 



Mat : 

 Opunfia Rafinesqiiii 



Interstitials : 



Cyperus UlicuUnis Croton glaiidulosits, var. 

 Froclichia florid ana septentrionalis 



Lepidiuni virginicnni Monarda punctata 



Cassia Chaniaechrista Linaria canadensis 



Polygala rerticillata Ambrosia psilostachya 



The ground here is open and has probably been used at times 

 for pasture. This accounts for the large number of interstitial 

 plants present. The same consocies extends also along the railway 

 rig'ht of way, where several additional species occur, including- the 

 following. 



Bunch-grass : 

 El\nius canadensis 



