BY D. McALPINE. 459 



Uromyces amygdali, Cooke, very abundant of late years 

 on the foliage of the peach and allied trees in Southe^-n 

 Queensland. 

 Weed — Fungi and Fungicides. New York, p. 65, 1894. 



Plum-leaf Rust — Paccinia pricni-spLnos(E. Only men- 

 tioned on plum leaves. 

 Pierce — Prune Rust : Journal of Mycology, vii., No. 4, p. 354, 

 1894. Affecting prune, plum, peach, nectarine, apricot, 

 cherr}^ and almond. 



Ammoniacal copper carbonate effectual for treatment. 

 McAlpine — Spraying for Fungus Diseases. Guides to G-rowers, 

 No. 15. Dept. of Agriculture, Victoria, p. 8, 1894. 



Improved form of Bordeaux Mixture a preventive for 

 this rust. 



EXPLANATION OF FIGURES. 



(Magnified 600 dia. except fig. 14.) 



Plate XXXI. (lower division of Plate). 



Fig. 1. — Pitccinia pruni, Pers., from Prnnus sp. , United States. 



a, uredospore yellowish-brown, closely echinulate; h, paraphysis, pale 

 lemon yellow and long-stalked: c, deep dark brown teleutospores 

 studded with short bluntish spines. 

 Fig. 2. — Uredospores and teleutospores on peach leaf from Queensland — 

 June, 

 a, uredospore, yellowish-brown, average twice as long as broad; h, 

 teleutospore, dark browa, but somewhat translucent; c, lower cell of 

 teleutospore detached, showing rounded top. 

 Fig. 3. — Uredospores and teleutospores of same, mounted dry. 



a, group of uredospores, individuals" selected from diflferent parts 

 of field; 6, group of teleutospores found together. 



Plate XXXII. 



Fig. 4. — Uredospores (a) with persistent pedicels and paraphyses (&) from 



peach leaf in own garden — June. 

 Fig. 5. — '.Termiii iting uredospore from peach leaf in own garden— June. 



Thoe are two germ-tubes, but one is in abeyance. 



Ayos ^ / 



LU I L I B R A R Y 



