CuxxiNGHAM.—The Uredinales, or Rust-fungi, of New Zealand. 623 
Variations from the above-described cycle occur in the different families 
CYTOLOGY. 
Space forbids more than brief mention of this subject here; fuller 
information may be obtained from the papers of Blackman (1904), 
Christman (1905, 1907), Olive (1908), &c. 
rior to the formation of aecidia, or primary uredosori (if the aecidia 
cell. The two nuclei do not fuse, but remain in the fusion cell, and, when 
this divides, both nuclei divide mitotically, but remain distinct from one 
another. This binucleate condition persists until teleutospore-formation, so 
that both aecidiospores and urediospores are binucleate. When a teleuto- 
spore is first formed both cells (Puccinia) are binucleate, but when the 
Spore is nearly mature the nuclei fuse and each cell of the spore is then 
uninucleate. Consequently, when the teleutospore germinates, the resultant 
basidiospores, the mycelium to which they give rise, and the spermogones 
and their spermatia are all uninucleate. 
DISTRIBUTION, 
Of the 75 species discussed in this part, 46 are indigenous and the 
remainder are introduced. Of the 46 indigenous species, 23 are endemic, 
19 occur in Australia, 15 in Tasmania, 4 in South America, and 6 extend 
to North America and Europe. The distribution may be illustrated better 
by the following table :— 
Uromyces - Puccinia 
Microtidis .. Aus. juncophila .. Aus., Tas 
puccinioides Aus., Tas. Lagenophorae  Aus., Tas. 
lymit Aus. Menthae  .. Aus., Eur., N.Àm 
Puccinia Morrisoni .. Aus., Tas. 
.. Aus. obscura .. NAD Eur. 
Caricis .. Aus., Tas., N.Am., Eur. Plagianthi .. Tas. 
Cinerariae .. Aus. садто Aus., Tas., N.Am., Eur., 
Coprosmae .. Aus., Tas. S.Am. 
Dichondrae Aus., Tas., N. S. Am. tasmanica ..  Aus., Tas. 
distincta .. Aus., Tas. Tetragoni .. Aus., Tas. 
Erechtitis us 'Thuemeni Aus., Tas 
Hederaceae A Unci 
us., Tas. 
Hydrocotyles N.Am., Eur., S.Am. 
In this paper (tribe Puccineae) 26 families are recorded as being 
attacked :— 
Aizoaceae . 1 P. | Goodeniaceae 1 U. | Polygonaceae +0., 2 Р, 
Campanulaceae .. 1 Р. | Gramineae 2 U., 6 Р. | Ranunculaceae .. 2 P. 
Chenopodiaceae . 1 U. | Halorrhagaceae 1 P. | Rhamnaceae x U. 
mpositae . 19 P. | Juncaceae e a ceae .. IP. 10. 
Convolvulaceae . 1 P. | Labiatae Ik | Rubiaceae. . eon BS E 
iferae c» RB. guminosae 5 U., 4 Ur. | Scrophulariaceae IE 
ce . 2 P. | Malvaceae 3 P. | Umbelliferae 5: P. 
Gentianaceae ee graceae 1 P. | Violaceae 1 P. 
Geraniaceae .. 2 P. | Orchidaceae 2 U. 
(G. = Gymnoconia. P. = Puccinia. U. = Uromyces. Ur. = Uromycladium.) 
