I0 <5 Uromycladium Leguminosae. 



X. Mesospores associated with uredospores, not uncommon, 

 ellipsoid to oblong or obovate, rounded at apex, smooth-walled 

 and wall of about equal thickness throughout, with colorless 

 stalk, 15-25 x 10-15 ft. They differ from uredospores in being 

 smooth and much smaller, and from the teleutospore in shape, in 

 not being thickened at apex and without apical germ-pore. 



On phyllodes of Acacia daUachiana F.v.M. 



Victoria Alps, near Bright, Dec., 1904 (C French, jr.). 

 On phyllodes of Acacia buxifolia A. Cunn. 



New South Wales New England. (From type of host in National 

 Herbarium, Melbourne.) 



On leaves and pods of A. dealbata Link. 



Victoria Murramurrangbong Ranges, Jan., 1905 (Robinson). 

 Tasmania Risdon, Dec., 1905, and Mt. Wellington, Jan., 1906 

 (Rod way). 



On phyllodes of A. implexa Benth. 



Victoria Myrniong, May, 1905 (Brittlebank). 



On phyllodes and pods of Acacia linifolia Willd., in National Herbarium, 

 Melbourne. 



New South Wales Blue Mts. 



Queensland Rockhampton, Nerbool Creek. 



This species very much resembles U. simplex in the appearance of the 

 sori, but it is allied to U. maritimum in bearing two teleutospores and a 

 vesicle on one sporophore. It differs from the latter, however, in the 

 uredospores which are generally clavate and warted equally all over. 



The vesicles vary in size, and are sometimes large and swollen when 

 they are ready to burst. In old material they may have disappeared 

 altogether. The teleutospores were much more numerous than the 

 uredospores in December. 



(Plate XXIV., Figs. 209-215.) 



Acacia. 

 -*. Uromycladium bisporum Me Alp. 



III. Teleutosori on the branchlets forming elongated slightly swollen 

 chocolate-brown masses, and on the under surface of the leaflets 

 appearing as powdery patches. 



Teleutospores two in a head, yellowish-brown, subglobose , 

 depressed globose, occasionally with very short, colored, stalk-likt, 

 basal projection, slightly thickened at apex with germ-pore im- 

 mediately beneath, 18-22 x 22-30 p. 



On branches, leaves and pod's of Acacia dealbata Link. 



Victoria Murramurrangbong Ranges, January, 1905 (Robinson). 

 Tasmania Risdon, Dec., 1905 (Rodway). 



No vesicle occurs below the septum, so that this species is an intermediate 

 form between U. simplex with a single spore and vesicle and U. maritimum 

 with two spores and a vesicle in each head. The occasional presence of two 

 teleutospores in U. simplex is a further indication of the passage from one to 

 the other. 



(Plate XXIV., Figs. 207, 208 ; Plate XXXIII.) 



