60 STATE HORTICULTURAL SOCIETY 



719. P. thalictri, Chev. 



On Thalictrum diocum, L. 



720. P. veronicae, (Shum.) Wint. 

 On Veronica virginica, L. 



721. P. vexans, Farlow. 



On Bouteloua racemosa, Lag.; Sporobolus cuspidatus, 

 Torr. 



722. P. vioZoj, DC. 



On Viola cucullata, Ait. 



723. P. xanthii, Schw. 



On Xanthium canadense, Mill. 



724. P. zygadeni, Trelease. 



On Zygadenus elegans, Pursh. 



725. P. heucherce, (Schw.) 

 On Mitella diphylla, L. 



726. P. flwflrto, Schw. 



Abundant August and September on corn. 



727. P. helianthi, Schw. 



Abundant on Helianthus tuberosus and H. grosseseratus 

 July, August and September. In August especially 

 destructive to cultivated sunflower. 

 PHRAGMIODIUM, Link. 



728. P. gracOe, (Farlow). 



On Eubus strigosus, Michx. 



729. P. obtusum, (Strauss) Wint. 

 On Potentilla canadensis, L. 



730. P. speciosum, (Fr.) 

 On Rosa blanda, Ait. 



731. P. subcortitium, (Schrank) Wint. 

 On Rosa blanda, Ait. 



732. P. rosae-alpina, Fr. 

 On roses, introduced. 



GYMNOSPORANGIUM, Hedw. 



733. G. clavarlceformis, DC. 

 On Juniper. 



734. G. clavipes, C. & P. 

 On Red Cedar. 



