336 UREDINEAE. 



As a preventive measure, it would be advisable to keep 

 down spurge-plants near fields or gardens where peas are likely 

 to be attacked. 



U. striatus Schroet. (U. S. America). Uredo- and teleutospores 

 on species of Loti/*, JLi/ieayo, Trifoliitm, and sometimes Vicia. 

 Pycnidia and aecidia are produced on Euplwrlna Cyparissias ; 

 the mycelium induces changes in the tissues similar to the 

 preceding species, but the Euphorbia remains stunted instead 

 of elongating as in attacks of U. pisi. 



U. dactylidis Otth. Uredo- and teleutospores on species of 

 Pott, Dactylis, Arena, and Brachypodium. Aecidia on several 

 species of Ranunculus (not on R. Ficaria}. (Britain and U.S. 

 America.) 



U. poae Kabh. Uredo- and teleutospores on Poa ; Aecidia 

 on Ranunculus Ficaria, R. bulbosus, and R, repens. (Britain). 



U. lineolatus Desm. (U. maritimus Plowr.). 1 Uredo- and 

 teleutospores on Scirpus maritimus. Aecidial forms = Aecidium 

 sii latifolii on Sium and Ace. Jiippuridis on Hippuris, also a 

 form on Glaux maritima in Britain. 



U. junci Desm. Uredo- and teleutospores on species of Juncus. 

 Aecidia on Pulicaria. (Britain and U.S. America.) 



(.'!) Only urcdosporcs und teleutospores known; they frequent 

 the same host. 



Uromyces caryophyllinus (Schrank.) 2 Carnation Bust. [This 

 attacks carnations at all stages of growth. The mycelium extends 

 inside the plant and forms spore patches which rupture the 

 epidermis. Uredospores are produced first, then the teleuto- 

 spores ; the former germinate at once, the latter only after a 

 resting-period. The use of sprays of potassium sulphide or 

 copper sulphate, and the cultivation of hardy varieties have been 

 recommended.] (Edit.) 



Uromyces scutellatus (Schrank.). On species of Euphorbia. 

 The mycelium is perennial in the root-stock and permeates the 

 whole plant. Teleutospores developed in dark-brown spots on 

 the under surface of leaves. Diseased stems are generally un- 

 branched, and carry only small leaves and no flowers. 



1 Plowright, Gardener's Chronicle, 1890. 



2 Halsted, N. Jersey Ai/ric. Coll. Exper. Station Report, 1891. Atkinson, 

 "Carnation Diseases," American Carnation Sot. ; with Illustrations. N. York 

 Aiji-if. Exper. Mat ion Bulletin, 1896. 



