TJromycladium Leguminosae. 1 09 



latter the warts are arranged in longitudinal lines, while in the former the 

 surface markings are net-like. See Plate XXIII., Figs. 201, 202, and 

 Plate XXV., Fig. 226. 



Some very large galls were found either surrounding or terminating 

 branches of the Black Wattle (A. decurrens). A size of 3-4 inches indiam. 

 was not uncommon, and one large clump resembling a big artichoke measured 

 5 x 14 inches, and weighed 15 ounces. In some cases the branches still 

 flourished beyond the gall, but it was evidently an expiring effort of the tree to 

 put forth leaves. The particular tree on which the largest galls occurred was 

 about 30 feet high and 13 years old, but many of the branches were decay- 

 ing, and it looked altogether rather dilapidated on account of the numerous 

 galls which were often tunnelled by insects. 



The mycelium was evidently perennial, as some of these galls were 

 several years old. 



Only the uredospores of this species were found at first, and were 

 described as Uredo notabilis by Ludwig. Dieter 5 has thrown out the suggestion 

 in his paper on "The Genus Ravenelia," that from the nature of the 

 uredospores in Ludwig's species they may be found to belong to Raveuelia, 

 and, considering the relationship of this genus with Uromydadium, the 

 suggestion turns out to be not far from the truth. 



(Plate XXIII., Figs. 196-205 ; Plate XXXVI.) 



Acacia. 



31. Uromycladium robinsoni McAlp. 



O. Spermogonia on discoid tubercles, minute, punctiform, ruddy-brown, 

 partially or entirely surrounded by uredosori or teleutosori. 

 Spermatia hyaline, minute, sub-globose, about 3-4 p diam. 



II., III. Sori amphigenous, numerous, crowded, up to f mm. diam., 

 light rust color, soon erumpent, powdery, and often surrounding 

 spermogonial tubercles. 



II. Uredospores pale yellowish, oval to ellipsoid or elongated elliptical, 



thickened at apex (up to 6 /.i), warted all over, particularly at 

 apex, with 2-3 equatorial germ-pores on one face, 38-45 x 

 19-22 p. 



III. Teleutospores at first intermixed with uredospores, solitary at end 

 of sporophore, with lateral vesicle beneath, golden yellow to golden 

 brown, depressed globose to sub-globose, smooth, slightly thickened 

 at apex, 19-26 X 25-34 p; vesicle hyaline, globose to shortly 

 ellipsoid, often on distinct stalk with septum at base, 20-25 p diam. 

 or 22-27 x 16-23 p. 



X. Mesospores not uncommon, ellipsoid to elongated ellipsoid or 

 elongated oblong, with thin and smooth walls, rounded at apex, 

 without germ-pores, 18-22 x 9-12 p. 

 On phyllodes of Acacia melanoxylon R. Br. 



Victoria Murramurrangbong Ranges, Nov. 1902, Dec. 1903, 

 Jan. 1905 (Robinson). Myrniong, May, 1905 (Brittlebank). 

 Tasmania Hobart, Dec., 1905 (Rodway). 



This species was found near Kergunyah by my assistant, Mr. G. H. 

 Robinson, in whose honor it is named. The teleutospores give a dingy 

 appearance to the phyllodes on both surfaces, and sometimes the sori are so 

 crowded as to convey the impression of a continuous mass of rust, or even 



