86 Uromyces Gramineae. 



The aecidia are described as follows : " Epiphyllous, and arranged 

 loosely in interrupted lines ; pseudoperidia persistent, composed of oblong 

 cells, with margin irregular and lacerated. Aecidiospores elliptic or ovoid, 

 21-29 x 18-21 jw." 



The aecidia on Danthonia are quite distinct. They occur on both sur- 

 faces of the leaf, are arranged in dense clusters, the margin of the pseudo- 

 peridium is regular and very finely toothed, and the aecidiospores are con- 

 siderably smaller. 



There is a good deal of confusion over the species of Danthonia in Aus- 

 tralia, and they probably require to be dealt with by a specialist. The late 

 Baron von Mueller, in his Census, included D. pallida R. Br., D. semiannu- 

 laris R. Br., D. pilosa R. Br., &c., under D. penicillata F.v.M. Following 

 the Index Kewensis, these three species will be retained, but D. penicillata 

 F.v.M., will be regarded as a synonym. 



Darlucafilum Cast., is common on uredosori. 



(Plate XVI., Fig. 131 ; Plate J.) 



Ehrharta. 



2. Uromyces ehrhartae McAlp. 



McAlpine, Agr. Gaz. N.S.W., VI., p. 855 (1895). 

 Sacc. Syll. XIV., p. 405 (1899). 



Uredo ehrhartae McAlp. 



II. Uredosori on both surfaces of leaves and on sheath, minute, oval to 



elongated linear, sometimes confluent, at first covered then naked, 

 yellowish-brown to orange. 



Uredospores subglobose to oval, orange, finely echinulate, 3-4 

 scattered germ-pores on one face, 21-25 x 18-20 u, average 

 '24 x 19 fi. 



III. Teleutosori similar, up to 1 mm. long, confluent in lines, chocolate 

 brown to black. 



Teleutospores pale chocolate brown to chestnut brown, only 

 occasional uredospores intermixed, hooded and thickened at apex 

 (8-9 p), and either conical or truncate, very variable in shape 

 and size, elongated or short and stout, subglobose to elliptic, 

 fusiform or oblong, 19-32 x 13-19 p, average 26 X 15 /i ; 

 pedicels persistent, tinted, elongated, up to 45 p long. 

 On Ehrharta stipoide* Labill. = Microlaena stipoides R. Br. 



Victoria Near Melbourne, Killara, Myrniong, Kergunyah. fcc., 

 June-March. 



Uredospores common but teleutospores rather sparse, although in the 



eighbourhood of Melbourne during December and January the teleuto- 



jometimes rather common, usually on the lower withered leaves, 



rmixed with uredosori on those still partially green. Only the 



uredo-stage was found at first by Mr. Robinson, but latterly at Killara, in 



Kergunyah, in November, he secured the teleutospores. 

 Darlucafilum Cast., is very common on uredosori. 



(Plate XVI., Fig. 13i>.) 



