The Erysipliaceae of Nebraska 1 1 



tate and colored dark brown throughout, but sometimes short, 

 tortuous, inter-woven and pale brown, sometimes lacking entire- 

 ly ; ascus broadly elliptical to sub-globose, rarely short-pedicel- 

 late, 45-90 X 50-75/i. ; spores 8, 20-25X12-18/*; averaging 22 



Xi5^- 

 On: Agrimonia hirsuta, Bidens frondosa, B. levis, Geum cana- 

 dense, Gilia linearis, Rhus glabra, Scnecio fremontii, 

 Taraxacum taraxacum. 

 Chadron, Cowles, Crete, Grand Island, Hastings, Lincoln, Long 

 Pine, Ord, Red Cloud, Roca, Valentine, Weeping Water. 



As here treated this species includes the variety 5. Iiumili ful- 

 ginca (Schlecht) Salmon. This variety is about as common as 

 the species. It is distinguished from the species by the larger 

 cells of the outer wall of the perithecium which are about 20-30 

 wide, while in 5\ humili they are 10-20^. This parasite which 

 occurs on Humulus lupuhts in Europe sometimes causes great 

 loss to hop growers. It has been found on this host in America, 

 but has not been reported on this host in Nebraska. 



Phyllactinia Lev. 



Perithecia large, globose-flattened to lenticular; asci 2- or 

 sometimes 3-spored ; appendages few, equatorial, rigid, acicular, 

 with a bulbous inflation at the base. Sometimes a sub-family is 

 made to take this genus as separated from the other genera of the 

 family. In Phyllactinia branches of the mycelium pass through 

 the stomata into the intercellular air spaces and from these 

 branches haustoria are sent into the neighboring cells. In all 

 the other genera the haustoria are confined to the epidermal cells. 

 The genus is represented by a single species. 



Phyllactinia corylea (Pers.) Karst. 



Phyllactima guttata (Wallr.)Lev. 

 Phyllactinia suffulta (Rebent.) Sacc. 



Usually hypophyllous, though with us rather commonly am- 

 phigenous ; mycelium evanescent or sometimes persistent ; peri- 

 thecia usually widely scattered, but now and then gregarious, 

 very large. 150-280/A, globose-depressed to lenticular, cellular 

 structure obscure, cells 15-20^ wide; appendages few, usually 

 five to fifteen, usually equatorial, easily broken off, hyaline, asep- 

 tate, swollen at the base into a hollow bulb ; asci 4-8, sometimes 

 more, ovate or oblong 60-105 X 25-40//., more or less pedicel- 



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