178 IOWA ACADEMY OF SCIENCES. 



Euphorbia hexagona. Panicum capillare (E & W) . 



Euphorbia heterophylla. Bouteloua racemosa (E & W). 



Foa conipressa (Eu). Panicum virgatuni (W). 



Panicutn Wilcoxianuni (W). Sporobolus cryptandrous (E & W) . 

 Andropogon scoparius (W). 

 Ca/ainovilfu lotigifolia. 



WOODBINE BLUFF FLORA. 



It is interesting in this connection to compare the flora 

 •of the loess bluffs with that occurring at Woodbine, The 

 region here is essentially the same as that at Woodbine 

 excepting that the loess is somewhat diminished and the 

 bluffs immediately encroaching upon the broad valley of 

 the Boyer are more or less wooded. It is a noticeable fact 

 here that of the strictly western species comparatively few 

 •of them are represented at Woodbine. On the grass cov- 

 ered bluff's the following are some of the more important 

 •of the plants. Of the early grasses we may mention — 



Stipa spartea, Poa compressa , 



Poa pratensis, Panicutn Scribnerianunt. 



Of the early vernal plants — 



Sisyrinchiutn angusiifolium , Hypoxis erecta, 



l^iola palmata var. cucullata, Viola ptda^ifida, 



Oxalis violacea, Corydalis aurea var. occidentalis , 



Sisymbrium canescens , Antenttaria plantaginifolia, 



Achillea millefolium, Lithospermum canescens , 



Lilhosperviunt angusiifolium, Caslillea sessiliflora. 



Astragalus carycocai pus . 



Of the later blooming plants we may mention as espe- 

 •cially prominent 



Delphinium azureum , Echinacea angustifolia , 



Polyhcnia Nutlallii, Phlox pilosa, 



Silene antirrhina , Erigeron anjiuus , 



Lobelia spicala . Putnex acetosella , 



Erigeron strigosus. 



especially the latter, which is extremely common. 



Of the late June and July plants we may mention espe- 

 <cially 



Monarda fistulosa, Heliopsis scabra, 



Psoralea argophylla, Anemone cylindrica , 



Asclepias verticillata, Lepachys pinnata, 



