1I4 Puccinia Gramineae. 



The teleutospores vary considerably in size and shape. They are some- 

 times elongated cylindric but usually cylindric clavate, the lower cell being 

 comparatively narrow and tapering slightly towards base, while the upper 

 cell is expanded and considerably flattened out at apex. The length may 

 vary from 40-70 /LI and the breadth from 12 p (in lower cell) to 25 /j, (in 

 upper cell). It is noticeable that certain sori may consist of elongated and 

 others of medium-sized spores. 



In the Agricultural Gazette for New South Wales, Vol. VI., p. 852, 

 1895, the rust on this native grass was given as P. dispersa Eriks. and 

 Henn., but on further examination I find that it approaches most closely to 

 P. agropyri Ell. and Ev. and is named accordingly. 



Specimens of P. agropyrina Eriks., were examined from Eriks. Exs. 419 

 on Agropyron repens Beauv., and the uredospores measured 21-24 /u diam. 

 or 24^27 x 16-21 p. The teleutospores, however, were considerably 

 smaller than our own material, measuring only 33-42 x 12-18 /u, average 

 ;J9 x 15 /LI. 



The following table will show at a glance the different sizes of the spores 

 on different hosts of the two species of rust : 



Uredospore. Teleutospore. 



P. ajropyrina Eriks. on Agropyron repens, Beauv. 1 6-25 /Lt diam. 36-41 x 13-16 \i 



/'. agropyri Ell. & Ev. on A. glaucum, Roem & Schult. 20-25 x 18-22 p 60-75 x 20-25 /t 

 P. ajropyriEll & Ev. on A. scabrum, Beauv. 25-32 x 19-22 p 40-70 x 12-25 fi 



Although the uredospores are described as smooth by Ellis and Everhart 

 yet in specimens from Sydow's Tired. Exs. 1362, they are seen to be 

 decidedly echinulate and it is a question whether such a thing as a smooth 

 uredospore exists among Puccinias. The species altogether is of the P. 

 dispersa type. Dietel 4 infected Clematis vitalba with the germinating teleu- 

 tospores of this species and produced spermogonia and aecidia (A. clematidis 

 DC.) so that it is considered to be a heteroecious species and called by 

 Klebahn, 1 p. 292, Puccinia (clematidi) agropyri Ell. and Ev. It is suggestive 

 that both stages have been found in the Murramurrangbong Ranges growing 

 near to each other. 



(Plate III., Fig. 25.) 



Deyeuxia. 

 35. Puccinia agrostidis Plow. 



Plowright, Grev. XXI., p. 110 (1893) and Gard. Chron., p. 



139(1890). 



McAlpine, Agr. Gaz. N.S.W. VII., p. 149 (1896). 

 Sydow, Mon. Ured. I., p. 717 (1903). 

 Sacc. Syll. XL, p. 202 (1895). 



II. Uredosori elliptical to elongated, soon naked, linear and confluent. 



Uredospores orange yellow, elliptical, finely echinulate, as many as 

 9 germ-pores seen on one face, forming a circle inside epispore, 

 22-24 x 17-18 /u. 



III. Teleutosori minute, black to dark-brown, long covered by the 

 epidermis, sometimes elongate, sometimes in groups. 



Teleutospores dark-brown, smooth, oblong or subclavate, apex 

 thickened (up to 5 /j), truncate or rounded, markedly constricted, 

 attenuated below, almost sessile, very shortly stalked, 40-54 x 

 14-21 p, average 44 x 18 /u. 



