73 



STUDIES IN THE VEGETATION OF THE STATE 



Beoondary Species 



Acerates viridiflora ivesii. Lilium canadense, 



A. viridiflora linearis. 



Agrostis alba. 

 Anemone cylindrica. 

 Amaranthus graecizans.i 

 Apocynum cannabinum. 

 Asclepias suUivantii. 

 A. syriaca. 

 A. tuberosa. 

 A. verticillata. 

 Astragalus carolinianus. 

 Baptisia leucantha. 

 Brauneria pallida. 

 Chaetochloa viridis. 

 C. glauca. 



Chenopodium album. 

 Convolvulus sepium. 

 Equisetum laevigatum. 

 Euphorbia glyptosperma. 

 E. nutans. 

 E. maculata. 

 Habenaria leucophaea. 



Lythrum alatum. 

 Mesadenia tuberosa. 

 Oxalis stricta.* 

 Phalaris arundinacea." 

 Phleum pratense. 

 Physalis heterophylla. 

 Physalis longifolia. 

 Plantago major. 

 P. rugellii. 

 Polygala verticillata. 

 Potentilla monspeliensis. 

 Psoralea argophylla. 

 P. tenuiflora. 

 Rosa arkansana.* 

 Ruellia ciliosa. 

 Scirpus atrovirens. 

 Solanum carolinense. 

 Steironema ciliatum. 

 Teucrium occidentale. 

 T. canadense. 

 Thalictrum purpurascens. 

 Verbena stricta. 



Lactuca pulchella. 



The estival period begins about the tenth of June, and is 

 characterized by the rapid diminution of the vernal bloomers 

 rather than by the addition of the important estival flowers. 

 The physical factors are changing rapidly and in most cases 

 approaching their maximum. The floral covering accord- 

 ingly undergoes a complete change. The white flowers of 

 Geanothtis ovatus continue on the ridges in maximum num- 

 bers, but the white-rayed flowers of the more frequent and 

 equally abundant Erigeron ramosus render them of second- 

 ary prominence. Bright yellow patcbes of Coreopsis palmata 



* Extending into tUa aspect from the remdi. 



