The Erysiphaceae of Nebraska 21 



specimens of fungi of every sort. All such specimens will be 

 carefully preserved and will be included in the proper publica- 

 tion when sufficient material is at hand to warrant its publica- 

 tion. So additional specimens and hosts of the Erysiphaceae, or 

 corrections in the present paper will be gratefully received. All 

 specimens of fungi should be accompanied in so far as possible 

 by the name of the host, or with sufficient material that the host 

 may be determined. For those fungi which do not have any 

 particular host plant the general nature of the substratum should 

 be indicated. 



HOST INDEX. 



Abbreviations : E. — Erysiphe, M. — Microsphaera, Ph. — Phyllactinia, P. — 



Podosphaera, S. — Sphaerotheca, U. — Uncinula. 

 Acer dasycarpum Ehrh. See Acer saccharinum L. 



Acer saccharinum L U. circinata 



Actinomeris squarrosa Nutt. See Verbesina alternifolia (L.) Britton. 



Agrimonia hirsuta (Muhl.) Bichnell S. humuli 



Amelanchier botryapium (L. f.) DC P. oxyacanthae 



Ambrosia artemisiaefolia L E. cichoracearum 



Ambrosia psilostachya DC E. cichoracearum 



Ambrosia trifida L E. cichoracearum 



Ampelopsis quinquefolia Michx. See Parthenocissus quinquefolia (L.) 



Planch. 



Amygadalus persica L S. pannosa 



Anogra pallida (Lindl.) Britton E. polygoni 



Apios apios (L.) MacM M. diffusa 



Aquilegia vulgaris L E. polygoni 



Aralia nudicaulis L Ph. corylea. 



Aster ericoides L E. cichoracearum 



Aster multiflorus Burgess E. cichoracearum 



Aster laevis L E. cichoracearum 



Aster nebraskensis Britton E. polygoni 



Aster nebraskensis Britton E. cichoracearum 



Aster paniculatus Lam E. cichoracearum 



Astragalus adsurgens Pall E. polygoni 



Astragalus canadensis L. See Astragalus carolinianus L. 



Astragalus carolinianus I E. polygoni 



Astragalus sp E. polygoni 



Bidens cernua L S. pannosa. 



Bidens f rondosa L S. humuli 



Bidens laevis (L.) B.S.P S. humuli 



Boebera papposa (Vent.) Rydb E. cichoracearum 



79 



