CunnincHam.—The Uredinales, or Rust-fungi, of New Zealand. 647 
another . . yet in the aecial stage racial strains play no part, gue 
the barberry acts аз à bridging host between each and every other gramineo 
host." In a later work Arthur and Fromme (1920, p. 295) include verom 
this species races та on s different hosts (exclusive of the 8 aecidial 
hosts), belonging to 35 gen 
Stakman, Piemeisel, ec DE (1918), as the result of cultural work 
extending over a period of four seasons, are of the opinion that “ bridging ” 
does not occur; furthermore, they claim that the “ы. s not act as 
à EE host, nor does it act as a reinvigorator of the r 
would appear a specialization is not as осей as Eriksson 
di Hee would have us believe; in fact, the conditions governing this 
specialization are so little understood, and the results obtained so contra- 
al 
that * no species can be accepted as valid until it is capable of definition 
in morphological terms " (1905, p. 18) 
4. Puccinia Poarum Nielsen. 
Niels., in Botanisk. Tidsskrift, vol. 3, p. 24, 1877. 
Hosts :— 
Poa annua L. On leaves. E No. 314. П, Kelburn (Wel- 
lington), G. H.C. 3 Feb., 
Poa oni L. On leaves. “Heb: No. 286. IL Kelburn (Wel- 
ааыа: Australia ; North America; Europe; Japan 
As I have no teleutospore material from which to describe this species, 
I have merely recorded this rust, together with the hosts. 
5. Puccinia simplex Eriksson and Henning. (Fig. 25.) 
Erikss. et Henn., Zeits. Pflanzenkr., vol. 4, p. 260, 1894. 
Puccinia straminis Drai Koern., Land. Forstw. Zeit., No. 50, 1865. pci ted 
Е Rostr. 
Hordei Niels., Ugeskr. Finda vol. 2, p. 567, 1874. P. 
Thuem., Fl., wot E Б 92, 1878. аы ornithogaleum Bubak, Ann. 
Myc., vol. 3, p. 223, 1 Dicaeoma anomalum (Rostr.) Arth. and NONE 
N. Am. Fl., "vol. Te 339, 1920, 
0. Spermogones amphigenous, in groups occupying large areas, honey- 
coloured. 
I. Aecidia amphigenous, scattered. Peridia cupulate, opening by a 
apical pore. Spores elliptical, 18-30 mmm. diam., minutely and closely 
verruculose. 
Uredosori amphigenous, seldom  caulicolous, cinnamon - brown, 
scattered or confluent, up to to 2 mm. long, pulverulent, surrounded by the 
ured epidermis. Spores elliptical or obovate, 20-30 x 16-25 mmm. 
т ета sparsely and finely echinulate, 1:5—2 mmm. thick, pallid brown, 
with 6 to 8 scattered germ-pores on one face, obscur 
ПІ. Teleutosori amphigenous, scattered or обола, elliptical, up to 
1:5 mm. long, pulvinate, compact, black, long covered. Spores clavate 
to cuneiform, 50-65 x 20-25 mmm.; apex truncate, obtuse, or bluntly 
acuminate, thickened up to 6mmm. or not thickened, base attenuate, 
basal cell longer, narrower, and lighter in colour than upper; slightly 
