CunnincuamM.—The Uredinales, or Rust-fungi, of New Zealand. 619 
Авт. 44.—The Uredinales, or Rust-fungi, of New Zealand: Part 1— 
Pucciniaceae, Tribe Puccineae (containing Descriptions and Illustra- 
tions of Seventy-five Species ). 
By G. H. CUNNINGHAM. 
[Read before the Wellington Philosophical Society, 27th October, 1921 ; received by Editor, 
31st December, 1921; issued separately, 8th June, 1923.] 
Plate 77. 
Or the three classes into which the fungi are divided by systematists 
(if we exclude the Fungi Imperfecti) the third class, the Basidiomycetes 
y > 
is characterized by the fact that the spores are borne at the apices of 
sterigmata which are in turn borne on basidia (see figs. 1, 2). 
Fig. 1.—Basidia of Agaricus arvensis : a, basidium ; b, sterigma ; c, basidiospore ; 
`d, paraphysis. х 500. 
Fro. 2.—Germinating mesospore of Puccinia novae-zelandiae n. sp.: a, basidium ; 
b, sterigma ; с, basidiospore ; m, mesopore ; p, pedicel. х 500. 
In this class are included the Uredinales, for the reason that the 
teleutospores (or final spores produced in the cycle of development) on 
rmination produce basidia,* which become divided into four cells by 
cross-septa, each segment producing a sterigma on which a basidiosporet 
is borne (see fig. 2, c). 
BIOLOGY. 
* Basidium = promycelium. The former is the more suitable term. 
f Basidiospore: In accordance with the classification this is the correct term to 
use. These spores are commonly termed “ sporidia ” or “ sporidiola." 
