I2 8 Puccinia Gramineae. 



Uredospores orange-yellow, subglobose to elliptic, finely echini 

 late, with 4-6 scattered germ-pores on one face, 25-29 x 19-22 



III. Teleutosori amphigenous and on sheath, covered by leaden- 

 coloured epidermis, at first minute, linear, then confluent in ve 

 long lines and even forming patches. 



Teleutospores variable in shape, clavate to oblong, constricted at 

 septum, brown, upper cell darker than lower, rounded or truncate 

 at apex and slightly thickened, lower cell attenuated towards base 

 or rounded, 35-52 x 16-24 p, average 37 X 17 p ; pedicel short, 

 hyaline, may reach a length of 20 p. 



X. Mesospores common, similarly coloured to teleutospores, slighth 

 thickened at apex, elliptic to ovate or pear-shaped, 25-32 x 

 16-21 p. 



Oil Alopecurus geniculatus L. 



Victoria Minyip, Nov., 1903 (Eckert). 



Among these plants one was badly rusted with the uredospores 

 Puccinia graminis but no trace of the teleutospores of that fungus w 

 found, although all the specimens were growing together. 



Plowright in a series of more than thirty cultures worked out the life 

 history of this fungus and showed the genetic connexion between the 

 aecidium on Ranunculus acris and this species, which was afterwards con- 

 firmed by Dietel and Klebahn. 



(Plate III., Fig. 23.) 



49. Puccinia poarum Niels. 



Nielsen, Bot. Tids. II., p. 26 (1876). 

 Cooke, Handb. Austr. Fung., p. 336 (1892). 

 Sydow, Mon. Ured. L, p. 795 (1904). 

 Sacc. Syll. VII., p. 625 (1888). 



II. Uredosori small, round or elliptical, scattered or aggregated togeth( 



orange-yellow or foxy- red. 



Uredospores shortly elliptical, finely echinulate, orange-yellow 

 21-24 x 15-18 p, seated on hyaline pedicels up to 30 p long, am 

 intermixed with numerous, stiff, capitate paraphyses, reaching 

 length of 68 p. 



III. Teleutosori small or large, scattered or orbicularly dispos 

 dark-brown to black, covered by the epidermis. 



Teleutospores elliptical or subclavate, very variable, aj 

 truncate, rounded or conical, thickened (4-8 p), dark-brown, 

 smooth, not or hardly constricted at septum, 35-45 x 15-21 

 or may reach a length of 53 p when 3-celled, average 38 x 19 

 pedicels persistent, short, brown. 



On leaves and stems of Poa annua L. 



Victoria Near Melbourne, Jan.-Dec., 1886, &c., II., III. 

 New South Wales Sydney, 1890 (Cobb). Botanic Gardei 

 Sydney, May, 1898. 



On Poa caespitosa Forst. 



Victoria Botanic Gardens, Melbourne, Dec., 1904. 



On Poa pratensis L. 



Victoria Port Fairy, Sept., 1904. Near Melbourne, Sept., 1904. 



