317 



minates in a small dunelike ridge, termed the lee deposits, consisting 

 of the sand blown out from the basin. The dunelike form is main- 

 tained by sand-binding perennials, many of which are the dune-form- 

 ers on the lake beach. 



Normally very little blowing occurs during the summer, and most 

 of the blowouts show various stages of stabilization. This is most 

 frequently indicated by bush clover {Lespedeza capUafa), evening 

 primrose (Oenothera rhonibipetala), and Panicnm virgatiiin, although 

 in any single blowout several other species may play the same role. 

 With the dying down of the vegetation in the fall, much sand is left 

 exposed to the winter winds, whose blowing power is not usually 

 much hampered by the protection of a snow covering. 



LIST OF THE SPECIES OE THE BLOWOUT ASSOCIATIONS 



I. Species characteristic of the basin association 

 Acerates viridMora lanceolata Lithospermimi angnstifolium 

 Sporobohis cryptandrus Lithospermimi gmelini 

 Buphorhia corollata Rhus toxicodendron 



II. Other species found in the basin 



Cypents fHicuhnis inacilentus Juiiipenis hovizontalis 



Oenothera rlionibipetala Juniperns coininunis depressa 



Koeleria cristata Opuntia rafinesquii 



Carex miihlenhergii Anwrpha canescens 



Qiiercus velutina (seedlings) J uncus torreyi 



Solidago neuwralis Rudbeckia hirta 



Arctostaphxios uva-ursi Hypericum kaUnianum 



Sniih-icina steUata Salix ghnicopJiylla 



Silene antirrhvna Aster ptarmicoides 



Andropogon scoparins Liatris spicata 



ScuteUaria parvula Bleocharis intermedia 



Liatris scariosa Lobelia kalniii 



Tradescontia redexa Potentilla fruticosa 



Jiincus balticus littoralis Polytrichum juniperinum 



Rosa humilis Verbascum thapsus 



III. Species characteristic of the windward slope 

 Panicnm huachucae 



The other windward slope species are the normal species of the 

 associations in wdiich the blowouts occur, and consequently are not 

 listed. 



