49 



AK< tnur.vL APOCYNI, Scliw. On Indian hemp or dogbane (Apoc- 

 tjm<m cannabinum). Not very common and seldom injurious, 



AECIDIUM COMPOSITAIIUM, Mart. var. HJKLIANTHI, Burrill. Sun- 

 flower cluster cup, or rust. On leaves of sunflower (Ileli- 

 ant/ius riyidus and H- yrosse-serrafais) common and often de- 

 structive. 



AKCIDIUM BUPHOBBiA,0meL Euphorbia, or spurge rust, or cluster 

 cup. On leaves of (Euphorbia sp .). Often very injurious, 

 completely covering the under surface of the leaves, and 

 causing the affected plants to have a more upright mode of 

 growth. 



AECIPIUM .IAMESIANUM, Pk. Milkweed rust. On wild milkweed 

 ( \sclepias syriaca and A. speciosa). Very common and quite 

 destructive, especially to the latter host. 



AECIDIUM URTICAE, Schw. Nettle rust. On leaves of common 

 nettle (Urtica gracilis). Rather uncommon, but rery de- 

 structive whenever found. 



AKCIDIUM VERBENAE Speg. Verbena rust- On leaves of hoary 

 vervain ( Verbena stricta}. As yet not common or destructive. 



USTILAGINEAE. THE SMUTS. 



USTII.AGO PANKJI-MILIACEI, (Pers.) Wint. On flower panicles of 

 old witch grass (Panicum capillare.) This smut has been ex- 

 ceedingly plentiful this year, and very damaging to its host, 

 often completely destroying the panicles, turning them into 

 black masses of spores. The plants are generally very much 

 distorted. 



ENTYLOMA PHYSALIDIS, (Klachbr & Cke.) Wint. White smut 

 of ground cherry. On leaves of Physalis lanceolata, form- 

 ing roundish spots in the tissues of the leaves; white on the 

 lower surface and brownish on the upper. Not uncommon 

 and usually causing but little damage. 



SPHAEROPSIDEAE. 



SEPTORIA ASCLEPIADICOLA, E. & E. Leaf spot of milkweed. On 

 swamp milkweed (Asclepias incarnata], Common and destruct- 

 ive. 



