301 



ON A MICRO-FUNGUS FROM MOUNT KOSCIUSKO; 

 AND ON THE FIRST RECORD OF UKCINULA IN 

 AUSTRALIA. 



Bv D. McAlpixe. 



(Communicated hy J. H. Maiden, F.L.S.) 



Puccini A calth^, Link. 



(Plate xxiii., figs. 1-4). 



Aecidiospores — Pseudoperidia distributed on upper surface of 

 leaf and often confluent; white, margin laciniate, about -J- mm. 

 diam. Pseudoperidial cells pentagonal or hexagonal, margin finel}^ 

 streaked, 28-32 /i. Spores bright orange, angular to subglobose 

 or oval, finely echinulate, average 22-23 x 17-20 /x. 



On living leaves of Calf ha introloha, F.v.M.; January, 1899; 

 Mt. Kosciusko. N.S.W. (Maiden). 



Greville* describes the Aecidium as hypophyllous and on the 

 petioles, but here it was epiphyllous and only on the blade of the 

 leaf. The spores and pseudoperidial cells quite agree with 

 British specimens. 



There is a special interest attaching to this fungus from its 

 geographical distribution. The host-plant was found in a rocky 

 creek, on eastern side of Mueller's Peak, Mt. Kosciusko, at a 

 height of about 6,500 feet. This was the only micro-fungus 

 found there by Mr. Maiden, and at that season of the year 

 (January) only the Aecidium-stage occurred. This is the first 

 record of the fungus in Australia. It occurs also in Europe 

 and America. Hitherto it has only been found on the Marsh 

 Marigold (Caltha 2Jcdustris, L.) 



* Flora Edinensis, p. 446, 1824. 



