142 



Puccinia Convolvulaceae. 



CONVOLVULACEAE. 



Dichondra. 

 66. Puccinia dichondrae Mont. 



Montagne in Gray's Fl. Chil. VIII., p. 46 (1845). 



Cooke, Handb. Austr. Fung., p. 338 (1892). 



Sydow, Mon. Ured. I., p. 321 (1902), and p. 881 (1904). 



Sacc. Syll. VII., p. 717 (1888). 



P. dichondrae Berk. Linn. Journ. XIII., p. 173 (1872). 



P. berkeleyana De Toni, Sacc. Syll. VII., p. 717 (1888). 



P. munita Ludwig, Zeitsch. f. Pflanzenk. II., p. 133 (1892). 



III. Teleutosori hypophyllous, punctiform, very minute, erumpent to 

 superficial, somewhat pulverulent, densely gregarious and often 

 covering entire surface, deep cinnamon, nestling among hairs, 

 70-100 fj. diain. 



Teleutospores clavate to oblong, golden brown, constricted at 

 septum, with comparatively thin epispore, thickened at apex and 

 produced into a hyaline apiculus (occasionally two), with granular 

 contents, and each cell 1-guttulate, occasionally 3 to 4 celled, 

 30-40 X 12-18 ju, average 32 x 14 /z ; pedicel hyaline, sometimes 

 tinted, persistent, generally slender, up to 46 p long, occasionally 

 6 p broad. 



X. Mesospores sub-ellipsoid to oblong, similarly coloured to teleutospore, 

 thickened at apex and usually with hyaline apiculus, 21-30 x 

 15-22 p. 



On Dichondra repens Forst. 



Victoria Near Melbourne, 1886 (Reader). Cheltenham, Nov. 

 1887 (French). Goulburn River Flats, Oct., 1896 (Robin- 

 son). Christmas Hills, May, 1900 (Robinson). Point Cook 

 May, 1902 (French, jun.). Murramurrangbong Ranges, Nov. 

 1902 (Robinson). Mt. Blackwood, Dec., 1902. Port Fairy, 

 Aug., 1905. Mentone, throughout the year, 1905, etc. 



New South Wales 1901 (Camfield). Richmond, April, 1905 

 (Musson). Recorded by Maiden 1 . 



South Australia Mount Lofty, near Adelaide, Oct., 1891 (Tepper). 



Tasmania North East (Mueller). 



I have examined the original material from the National Herbarium, 

 Melbourne, and find that there must have been some mistake over the 

 measurements of the spores, which were given as *005 inch (130 ^i) by 

 Berkeley, which is evidently a misprint. Next, Dr. Cooke in his Handbook of 

 Australian Fungi makes a correction by giving the size of the spores as 

 12-13 /LI long, which evidently errs on the other side. Then De Toni 

 changed the name to P. berkeleyana, seeing that the size of the spores as 

 given did not at all agree with those of P. dichondrae, Mont. 



Another unfortunate error has arisen in connexion with this species 

 through the wrong naming of the host-plant. Mr. Tepper sent a rust to 

 Prof. Ludwig from S. Australia, said to be on the living leaves of Hydrocotyle 

 hirta R. Br., who determined it as a new species, P. munita. But on Prof. 

 Ludwig kindly sending me some of the original material it was found that 

 the leaves belonged to Dichondra repens and that the rust was P. dichondrae, 

 a conclusion with which Prof. Ludwig agreed after examining the specimens 

 sent to him. 



