164 



Puccinia Compositae. 



On leaves and stems of Senecio vulgaris L. 



Victoria (Ralph), (Robinson), (French, junr.), c., I. III. 

 New South Wales (Hamilton), I. 

 * Tasmania 1891, 1893, 1895, 1897, I. III. (ftodway '). 



On Senecio peciinafus DC. 



N"ew South Wales Mount Kosciusko, Jan., 1898,1. (Maiden). 



On Senecio brachyglossus F.v.M. 



Victoria August, 1900, I. (Reader). 



On Senecio veUeioides, A. Cunn. 



Victoria Sealers' Cove, 1854, I. Port Phillip, 1886, I. 



It differs from P. senecionis Lib., in the aecidia being amphigenous and 

 not hypophyllous ; also in the teleutospores being considerably larger, 

 thickened at apex, and not provided with a hyaline papilla, while the pedicel 

 is decidedly persistent and elongated. Groundsel, or S. vulgaris, being an 

 imported plant, and so cosmopolitan in its character, it was considered 

 strange that a new species of rust should be found upon it, and although I 

 had named it in MS. P. australiensis, yet I delayed publishing it under 

 that name, hoping bo find the teleutospores on a native Senecio. 



Teleutospores are very common in some localities during the winter and 

 spring months, and the Groundsel growing on the coast at Port Fairy was 

 so overrun with both aecidia and teleutosori that the plants were stunted 

 in growth. 



S. pectinatus DC., occurs in the three States from which Puccinia 

 tasmanica has been recorded, but only the aecidia} stage has been met with 

 in New South Wales. 



(Plate VII., Fig. 52.) 



Vittadinia. 



93. Puccinia vittadiniae Me Alp. 



I. Aecidia on both surfaces of leaf, but mostly on upper, scattered or in 

 groups and confluent, minute ; pseudoperidia white becoming 

 yellowish, immersed, with lobed margin ; peridial cells with striated 

 margin in section, striae projecting and appearing as points in sur- 

 face view, oblong, 25-32 x 13-16 p. 



Aecidiospores yellowish, ellipsoid, very finely verrucose, 14-17 X 

 11-13 p. 



III. Teleutosori minute, black, sparsely developed, intermixed wit 

 aecidia. 



Teleutospores dark chestnut-brown, oblong to elongated oblong 

 clavate, smooth, constricted at septum, generally rounded at base 

 and apex, sometimes bluntly pointed or truncate, and thickened at 

 apex (6-9 p), 31-46 x 18-25 p, average 34 X 21 p ; upper cell 

 darker than lower and similar or sometimes considerably broader ; 

 pedicel hyaline, persistent, 30-40 p, long, and up to 9 p. broad 

 adjoining spore. 



X. Mesospores very common, similarly coloured to teleutospores and 

 stalked, ovoid to elongated ellipsoid, rounded or beaked at apex and 

 thicHned (up to 9 p), 25-34 x 14-17 p. 



