Pticcinia Juncaceae. 137 



Luzula. 

 59. Puccinia tenuispora McAlp. 



II. Uredosori hypophyllous, round to ellipsoid, scattered or often con- 



fluent in lines, yellowish-brown, soon naked and girt by the 

 ruptured epidermis, compact, on irregular, confluent, purplish 

 spots. 



Uredospores yellowish to pale yellowish -brown, elliptical to 

 obovate, echinulate, with 1-2 germ-pores on one face 20-25 x 

 15-22 p. 



III. Teleutosori dark-brown, ellipsoid, scattered or crowded, often con- 

 fluent, pulvinate, compact, soon naked, on similar spots. 



Teleutospores oblong to clavate, ochrey-yellow, fragile, smooth, 

 apex generally rounded, rarely truncate or conical, thickened up to 

 ll/i, attenuated towards base or rounded, constricted at septum, 

 30-50 x 14-20 p, average, 42 x 17 ^ ; pedicel hyaline, per- 

 sistent, generally about 30 p long. 



X. Mesospores abundant, clavate to obovate or oblong, smooth, 

 thickened at apex and similarly coloured to teleutospore, 22-32 x 

 13-16 p. 



On leaves and stems of Luzula campestris L. 



Victoria Murramurrangbong Ranges, Nov. and Dec., 1902-3, 

 Jan., 1905 (Robinson). Wandin, Nov., 1903 (C. French, 

 jun.) 



On Luzula oldfieldii Hook. f. 



Tasmania Mt. Wellington, Jan., 1892, II. (Rod way). 



Cooke in his Handbook of Australian Fungi gives Aecidium bellidis 

 Thuem. which is supposed to represent the aecidial stage of Puccinia obscura 

 Schroet., occurring on Luzula, but the aecidium found on Bellis perennis here 

 is associated with its own teleutospores, and belongs to a distinct fungus, 

 P. distincta McAlp, so that whatever may be the case in Britain, the rust 

 on the daisy is autoecious with us. 



The discovery of a rust on Luzula campestris, which does not belong to 

 the Old World species, i a further proof against its genetic connexion with 

 that of the daisy. The species differs from P. obscura and P. oblongata. 

 The teleutospores are characteristically fragile, thin-walled, and easily 

 collapsible, and while of the same general type as in P. oblongata, they are 

 much smaller. In P. obscura the colour is much deeper, and the wall is de- 

 cidedly thicker and firmer. This is well shown in Plate IV., Fig. 34, in 

 which the spores are taken from a specimen of Luzula campestris in Sydow's 

 Ured. Exs., 1076, collected in 1896, and the material from which our de- 

 scriptions are made is as recent as 1905. In P. oblongata the apex of the 

 teleutospore is much thicker, being 10-20 p, and the size is 40-80 x 16-24 /i. 



The teleutospores are frequently found germinating, showing that they 

 do not require to undergo a period of rest. 



Dariuca filum Cast, occurs frequently on the uredosori. 

 (Plate IV., Figs. 33, 34.) 



