18 THE BOTANIC. I L MAGAZINE. I vol. xxvu. m. w. 



may be produced in about 1.5 hours after being sown. (Fig. 4.) 



The promycelia are mostly stipitate sometimes even as long 

 as 95 ft, but occasionally almost sessile. They are mostly 

 curved at the tip and three to four septate, producing a 

 sterigma from each cell on the convex side. (Fig. 5.) The 

 sterigma are comparatively well-developed, measuring 10—32 ft 

 x 4— 5 ft ; and the sporidia are subspherical, pointed at the base, 

 10 to 12 ft long by 12 to 14^ broad. (Fig. 6.) 



Our fungus, although somewhat anomalous in character, 

 apparently belongs to the genus Uromyccs. The species of 

 Uromyces which have been known as parasitic on Acacia, are 

 six in number; they are as follows, Uromyces bicinctus Mc 

 Alpine, U. fusisporus Cke. et Mass., U. phyllodiorum (B. et 

 Br.) Mc Alpine, U. Schweinfurthii P. Henn., U. Tepperianus 

 Sacc, and U. versatilis Peck. Among them, four species were 

 found from Australia and one species from Arabia and another 

 one from North America. Many species of Acacia have been 

 known to be their hosts ; but there seems no account to be 

 found relating to Acacia confusa as a host of Uromyces. By 

 comparing our fungus with the above mentioned species, we 

 find it to be quite distinct from all of them in the following- 

 characters : 



In Uromyces bicinctus Mc Alpine, its teleutospores cliffer 

 from those of our fungus by having brown epispore strikingly 

 thickened (8-11 ft) at the apex ; in Uromyces fusisporus Cke. 

 et Mass., teleutospores differ by having brown, finely dotted 

 and thicker epispores ; in U. phyllodiorum (B. et Br.) Mc Alp., 

 teleutospores differ b_v having coronate or acute tip ; in U. 

 Schweinfurthii P. Henn., teleutospores differ by having verru- 

 cose epispore and being globose, small in size ; in U. Tepperianus 

 Sacc, teleutospores differ by having the depressed spherical, 

 cinnamon-colored and smaller teleutospores ; and in U. versati- 

 lis Peck., teleutospores differ by having rust-colored and yel- 

 lowish rust-colored epispore and shorter pedicel. 



The uredospores of our fungus resemble very much to those 

 of some species of Uromycladium or those of Uromyces fusi- 

 sporus Cke. et Mass. But from the above mentioned differences 



