Puc curia Goodeniaceae. 145 



III. Teleutosori amphigeiious, but mostly on upper surface, very rarely 

 mixed with aecidia, forming clusters of black, bullate pustules on 

 indefinite, pale, ruddy, thin spots, oval or elongated, usually 

 confluent, arranged circularly, or in lines, at first girt by 

 ruptured epidermis, which finally falls away. 



Teleutospores clavate, golden-brown to chestnut, thickened at 

 apex, constricted at septum, sometimes 3 or 4 celled, 45-60 x 

 18-21 ju, average 50 x 20 p. ; upper cell generally pointed, but 

 often rounded and occasionally truncate, deeper in colour than 

 lower ; lower cell tapering towards base and generally longer than 

 upper; pedicels persistent, pale-yellowish to hyaline, 40-50 x 

 9-10 p. 



X. Mesospores occasional, similarly coloured to teleutospores, rather 

 oblong, thickened at apex, rounded or truncate, slightly narrowed 

 at base, 28-38 x 17-21 //. 



On leaves and petioles of Brunonia australis Sm. 



Victoria Drysdale, Oct., 1895, III. Murramurrangbong Ranges. 

 Nov., 1902, Dec., 1903, O., L, III., and Jan., 1905, III, 

 (Robinson). Alps, near Bright, Dec., 1904, III. (C. French, 

 jun.). Rutherglen, Dec., 1904, III. 



Three-celled teleutospores occasionally seen, varying in length from 

 60-73 p and in breadth from 21-24 //, the lower cell generally about 

 as long as the other two. 



Four-celled teleutospores are very rare, elongated clavate, 63 X 24 p y 

 the two upper cells about 33 x 24 p, and the two lower 30 x 14 p. In 

 the same group there were three 3-celled teleutospores with an average 

 size of 59 x 23 //. 



At first no aecidia were known, but these were found along with the 

 teleutospores by G. H. Robinson. 



The discovery of aecidia rendered it necessary to carefully compare the 

 two fungi found upon the Goodeniaceous plants, Brunonia and Goodenia, 

 and a large number of specimens and slides were accordingly examined and 

 compared. 



While the rusts are of the same general type, they differ in several 

 important respects. The aecidiospores in P. saccardoi are considerably 

 smaller, and the peridial cells are generally much more elongated, and more 

 than twice as long as broad. 



In the original description by Dr. Ludwig the size of the aecidiospores 

 is given as 13-15 p diam., and the peridial cells as 18-25 X 15-18 //, but 

 if the latter are measured when isolated they are found to be much longer. 

 Again in P. saccardoi the teleutospores are generally intermixed with or 

 surround the aecidia, but this very rarely occurs in P. brunoniae. In the 

 former the teleutospores are generally rounded at apex, but in the latter 

 generally pointed and altogether narrower. 



In the Murramurrangbong Ranges where the aecidia and teleutospores 

 of P. brunoniae were found very plentifully in November, though 

 Goodeniaceous plants which, in other districts are affected by P. saccardoi y 

 were exceedingly common and were often growing alongside the Brunoma, 

 no rusts were found on them, even although the country was subjected to a 

 most exhaustive search. The rusts, therefore, on the two different genera 

 are considered to be specifically distinct. 



(Plate VI., Fig. 50.) 



