CunnincHam.— The Uredinales, or Rust-fungi, of New Zealand. 645 
length of 2-3 mm., bullate, pulverulent, becoming exposed by the epidermis 
rupturing longitudinally. Spores elliptical, often obovate, sometimes sub- 
globose, 20-38 x 14-20 mmm. ; epispore coarsely and moderately echinulate, 
ьн mmm. thick, golden-brown, with 3-4 equatorial germ-pores on one 
ace 
ПІ. Teleutosori on sheaths, stems, and inflorescences, seldom on blades, 
at first scattered, becoming confluent and linear, attaining a length of 
12mm. or more, Vesper compact, black, at first covered, becoming 
Spores elli 
ныг x 15-25 mmm. ; apex acuminate, sometimes oblique, thickened, up 
12 mmm., more deeply coloured than rest of spore, base attenuate, 
d cell longer and narrower than upper; constricted at septum; epi- 
septum, conspicuous. 
X. Mesospores common, elliptical, 30-45 x 11-15 mmm. ; apex acumi- 
nate, frequently rounded, thickened. 
Hosts :— 
Avena sativa L. On blades, culms, and inflorescences. Herb. 
o. 323. П. Marton enon, C. Н. Schwass ! 16 Feb., 1921. 
IL III. Ruakura (Auckland), G. H. C. 28 Feb., 1921. 
Dactylis glomerata L. On blades and culms. Herb. No. 395. 
m s Springfield (Canterbury), 500 m., W. D. Reid! 18 June, 
Mio: elatior On culms, leaves, and sheaths. Herb. No. 332. 
п, III. Helos (Auckland), E. Bruce Levy! 15 Feb., 1921. 
Festuca pratensis Huds. On culms. Herb. No. 347. II, Ш. Gore 
(Otago), А E ти, 4 Мау, 1921. 
Lolium pere culms апа leaves. ge No. 347. 
П, ш. E uci. d В Tennent! 4 Мау, 19 
Түс vulgare Vill. On blades, culms, and SP 0А Herb. 
No. 299, 300. II, III. Ruakura (Auckland), A. H. Cockayne ! 
25 Jan., 1921. П. Canterbury, F. E. Ward! 18 Feb., 1921. 
Lolium multiflorum Lam. On leaves and culms. П, III. Mou- 
mahaki (Wellington), J. W. Deem! 9 Jan. 1922. Ruakura 
., 1922. 
Lolium temulentum L. On leaves and inflorescences. II, III. Mou- 
mahaki чое, J. W. Deem! 9 Jan., 1922. 
Distribution : World-wi 
The aecidia, which occur on Berberis spp., have not been collected 
in New Zealand. In Australia, McAlpine (1906, p. 67) proved that the 
Australian forms would not infect barberry; yet, although this is the case, 
of the species. How, then, is the rust carried over from year to year? 
Probibly- the cw: reasonable goed is that of the өзгөй of 
uredospores on grasses as has been shown by many experiments 
(Jacky, 1900 ; Bolley, 1898; Barclay 1891), they are capable of remaining 
viable for a considerable p eriod. would appear that viability of uredo- 
spores is a matter of dinde, as ‘uae appear to remain viable in warmer 
localities for a much longer period than in colder areas. 
