Phragmidium. 185 



This is a portion of the original material which was named Aecidium 

 bai'hareae in Cooke's Handbook of Australian Fungi but, on closely 

 examining it, teleutosori were found. The host-plant is not Barbarea 

 vulgaris R. Br., which is the only species of that genus in Australia. 



(Plate XXX., Fig. 266.) 



DILLENIACEAE. 



Hibbertia. 

 121. Pnccinia hibbertiae Me Alp. 



III. Teleutosori ruddy-brown to black, compact, soon naked, up to 

 1 mm. diam., on under surface of leaves. 



Teleutospores pale yellowish-brown, oblong to somewhat clavate, 

 smooth, constricted at septum, 35-41 X 18-21 ^ ; upper cell 

 rounded at apex to somewhat conical, usually thickened (up to 

 6 //) ; lower cell generally rounded at base, sometimes slightly 

 attenuated ; pedicel hyaline, persistent, elongated, slender, 

 120-150 p long. 



X. Mesospores occasional, similarly coloured to teleutospores, generally 

 fusiform and thickened at apex, sometimes elongated oblong, 

 33-35 x 12-16 //. 



On Hibbertia sericea Benth. 



Victoria Cheltenham, July, 1904 (Robinson). Oakleigh, Sept., 

 1904. 



The small size of the leaf together with the scanty sori render this 



species easily overlooked. The teleutospores are often noticed germinating 

 in situ. 



(Plate XXX., Kg. 265.) 



PHRAGMIDIUM Link. 



This genus occurs exclusively on the Rose family, and of the 46 species 

 recorded by Dietel 13 , only four are found in Australia. They are all autoe- 

 cious, and in some instances spermogonia accompany aecidia. The aecidia are 

 of the caeoma type, but paraphyses take the place of a peridium. The species, 

 (P. barnardi) on the native raspberry (Rubus parvifolius) does considerable 

 damage, and the imported species P. subcorticium is spreading extensively 

 on the sweetbrier. 



><ral Characters. Spermogonia flattened or slightly raised, generally 

 arranged in concentric circles. 



Aecidia after caeoma type, surrounded by a dense crown of inwardly- 

 curved paraphyses. 



Caeomospores with numerous distinct germ-pores distributed over the 

 entire surface. 



I ^redosori likewise surrounded by paraphyses. 



Uredospores solitary on basidia, with numerous germ-pores. 



Teleutospores separate, pedicellate, consisting of from three to ten, 

 superimposed cells, the uppermost of which has one to three germ-pores, 

 the others about three to four each, placed laterally. 



Sporidiola spherical. 



Australian species, 4. 



