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 Lotus, Mcdicago, Trifolium, and sometimes Vicia. 

 Pycnidia and aecidia are produced on Etqjhorhia Cyjxtrissias ; 

 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 

 Poa, DdctjjlU, Avcna, and Brachyjjodium. Aecidia on several 

 species of lianunculus (not on R. Ficaria). (Britain and U.S. 

 America.) 



U. poae liabh. Uredo- and teleutospores on Foa ; Aecidia 

 on Fanuncidvs Ficaria, R. hulbosm, and R. repens. (Britain). 



U. lineolatus Desm. {U. maritimus Plowr.).^ Uredo- and 

 teleutospores on Scirpus maritimus. Aecidial iovvas^ Accidium 

 sii latifolii on Sium and Aec. hippuridis on Hip)2niris, also a 

 form on Glanx maritima in Britain. 



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

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



(;]) Only uredospores und teleutospores known; they frequent 

 tlic same Jieisf. 



Uromyces caryophyllinus (Schrank.)'- 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. 



-Halsted, N. Jerseif Agric. Coll. Exper. Station Report, 1891. Atkinson, 

 "Carnation Diseases," American Carnation Soc. ; witli Illustrations. iV. York 

 Agric. Exper. Station Bulletin, 1896. 



