2O2 Uredo Gramineae, Cy-peraceae. 



a composite species, the aecidiospores infecting various grasses on which 

 they produce uredo and teleutospores. Until similar experiments are 

 carried out here, the different aecidia, occurring on species of Ranunculus 

 must be grouped together. 



Darluca filum Cast, was found associated with the aecidia. 



(Plate XXXIX., Fig. 296.) 



UREDO Pers. 



This stage probably belongs to teleutospore-forms which have not been 

 observed, and which may only rarely be produced. But it is also quite 

 possible that some may possess a perennial mycelium, and dispense with the 

 necessity of forming teleustopores. Several in Dr. Cooke's Handbook of Aus- 

 tralian Fungi have been referred to their proper genera. U. notabilis Ludw., 

 belongs to Uromycladium notabile, and U. armillata Ludw., to Puccinia 

 juncophila. U. clematidis Berk., has already been shown to be a Caeoma, and 

 U. cichoracearum DC., as determined by Cooke, belongs to U. bidentis P. 

 Henn. 



General characters. Seri without pseudoperidium, covered or erumpent, 

 for the most part orange-yellow, rather pulverulent, and spores produced 

 singly on the terminal ends of hyphae, never smooth. Germination by germ- 

 tube, which enters the host-plant through stomata. 



Uredo-forms, 13. 



GRAMINEAE. 



Saccharum. 



146. Uredo kuehnii Krueg. 



Krueger, Bericht. Zuck. Java IX., p. 117(1891). 

 Cobb, Agr. Gaz. N.S.W. IV., p. 799 (1893). 

 Sacc. Syll. XL, p. 182 (1895). 

 Uromyces kuehnii Krueg. 



II. Sori mostly hypophyllous, linear, at length bursting through epidermis 

 and forming elongated brownish or blackish narrow streaks, single 

 or confluent, with clavate, brown paraphyses. 



Uredospores globose to ellipsoid or piriform, brown or orange, 

 rather thin-walled, echinulate, 47-53 x 28-35 ^u ; pedicels hyaline, 

 clavate, somewhat shorter than spore. 

 Common on leaves of Snccharum offiicinarum L. 



New South Wales Clarence River (Cobb 7 ). 

 Queensland Brisbane and Mackay, 1898 (Tryon 5 ). 



Dr. Cobb found the spores to possess four equatorial germ-pores, and I 

 have given his measurements, although Krueger makes them out to be 

 28-57 x 18-34 p. 

 Specimen not seen. 



CYPERACEAE. 



Scirpus. 



147. Uredo scirpi-nodosi McAlp. 



II. Sori bullate, elongated, splitting lengthwise, running in lines on stem, 

 1J-2 mm. long. 



Uredospores brown, subglobose, ellipsoid to oblong, variable in size, 

 25-32 n diam., or 27-36 X 19-25 /j. ; epispore echinulate, often 

 3 thick. 



