AT FAYETTE, IOWA. 9 



very small and irregular; appendages very numerous, slender, simple. a"bout equal 

 to the diameter of the peritheeium, hyaline, smooth, tips not swollen, ascending 

 from the upper half of the peritheeium; asei numerous. 14 or more, long and slender, 

 oblong or narrowly ovate; pedicellate, about 30 by 75 u\ sporidia S, small, about 10 

 by 15 //. 



On Acer saccharinum. 



My specimens have cS asci; in this they resemble U. Aceris. I ob- 

 tained European specimens of the latter, and mine do not resemble 

 them in other respects. 



5. U. Salicis, (DC.) Winter. 



Amphigenous. Mycelium abundant, persistent; perithecia usually large, i<><>- 



160 //. wall-tissue soft, elastic, reticulations rather small and indistinct; appendages 

 vari ible in number, usually very numerous, hyaline, not much swollen at the tip, 

 once to twice as long as the diameter of the peritheeium; asci from 4. or 5 to 12 or 

 more, ovate; sporidia usually 4 or 5, sometimes 6-8. 



On Salix sp. and Populustremuloides. 



Besides these species of [fncinu la, I found, late in the season, speci- 

 mens on Polygonum Virginianum and Rubus strigosus which I could not 

 certainly determine. Though no mycelium was found and the perith- 

 cia were few, I think neither had blown from other hosts as the perithe- 

 cia were somewhat clustered in both cases, and no other hosts were 

 found near. After examining quite a number of perithecia on Poly- 

 gonum, I think the parasite will prove to be Unci nit la Clinton ii. Peck. 

 The one on Rubus seemed most like U. gcniculata, Gerard, but no 

 perfect perithecia were found. I shall try to determine these next 

 summer. 



Phyllactinia, Lev. 



Peritheeium containing several asci; appendages free Iron the mycelium, 

 acicular, acute at the tip, abruptly swollen at base. 



I. P. SUFFULTA, (Reb.) vSacc. 



Mostly hypophyllous. Mycelium abundant, persistent, or scant and evanescent; 

 perithecia very large. 150-275 //, wall tissue soft, cellular structure and reticulations 

 obseure; appendages few, usually S-12, easily detached, hyaline, varying in length 

 from less than to three or four times the diameter of the peritheeium, asei 4 or 5 to 20 

 or more, ovate, pedicellate; sporidia normally 2, occasionally 3 or 4. variable in size. 

 mostly large. 



On Desmodium acuminatum, Xanthoxylum Americanum, Cornus 

 farrida, C . stolonifera, Cratceguis sp., Fraxinus sp., Ulmus Americana, 

 Corylus Americana and Bctula papyri fcra. 



I have only reported this species on two hosts not found recorded, 

 viz. I), acuminatum and C. florida; but it is the most common of the 

 ErvsipJiac here and is found on other hosts. In collecting fungi in 

 dense woods, I found the perithecia in October on ever/ phaenogam 

 carefullv examined. In two and one half hours, I found perithecia on 

 forty different plants including grasses, terns, and orchids. In all I 

 have collected sixty-Jive different kinds of leaves containing perithecia 

 of this species. In most cases no mycelium was found, and the perithe- 

 cia were doubtless, in many instances, blown from some badly infested 

 host. Yet I think the hosts are unusually numerous here and that 

 some bear the parasite because near the proper hosts, and in a favorable 

 location, which would not in other places. In such cases, I should ex- 

 pect to find the mycelium evanescent and the perithecia scattered. For 

 this reason, scattered perithecia without mycelium might be found in 

 October on some hosts. I shall watch the woods where- Phvllactiniii was 



