CuxNiNGHAM.— The Uredinales, or Rust-fungi, of New Zealand. 641 
save the proximity of the two stages and their hosts. In such an instance 
rminin 
according to the classification of Engler and Prantl. This treatment serves 
in some measure to split the genus (which now contains over 1,500 
pond into groups, and brings all closely related species together. That 
is necessary is evident when one considers the number that have been 
bai on host-distinctions alone. 
l. Puccinia coronata Corda. (Fig. 22.) Gramineae (1). 
Cda., Icon. Fung., vol. 1, p. 6, 1837. 
d M vnd Pers., in J. F. Gmel. Syst. Nat., n 2, 1472, 1791. А. crassum 
Neues ‚ vol. 1, p. 92, 1794. . Cathartici um., Enum. 
Pi "Sael vol. 2, p. 225, 1803. A Allenii Ww Clinton : Peok, in Ann. 
Rep Mus., vol. 24, p. 93, 1872. A. pulcherrimum rk., in 
Grev., vol. 3, 87 Puccinia Lolii Niels., Ugeskr. Landw. 1. 4, p 
1875. Rhamni Wettst., Vehr. Zool-Bot. Ges. Wien, vol. 35, p. 545, 1886 
P. coronifera t Zeits. Pflanzenkr., vol. 4, p. 135, 1894. 
Lagerh., T'romos e Mus. Aarsh., vol. 17, p ‚ 59, 1895. Р. Melicae Syd., Mon 
Ured., vol. E р. 760, 1902. Dicaeoma ‘Mali icae Arth., Proc. Ind. Acad. Sci., 
1903, p. 149 Том. -Puceinia Beckmanniae McAlp., Rusts Aus., p. 116, 1906. 
Р. praegracilis Arth., Bull. Torr. Club, ve. 34, p. 585, 1907. Р. Erikssonii 
Bubak, Arch. Nat. Land. Boehem. „ vol. 1 d 107, 1908.  Dicaeoma Rhamni 
(Pers.) Kuntze, Rev. Gen., vol. 7, p. 470, 1 
0. Spermogones amphigenous, associated ges the aecidia, reddish- 
brown 
I. Aecidia amphigenous, compacted in small groups on yellow distorted 
spots, and on flowers and fruits, озшде: m w. Peridia cylindrical, margins 
hyaline, revolute, finely laciniate. es globose or broadly elliptical, 
16-24 x 14-20mmm.; epispore ee goes and finely verruculose, 
1-1-5 mmm. thi 
II. Uredosori amphigenous, and on sheaths, at first scattered and 
elliptical, ne aggregated and often linear, frequently reaching a 
length of 2-3mm., bullate, brownish-yellow, becoming pulverulent and 
naked. Uredospores globose, elliptical, or obovate, 22-30 x 18-25 mmm. ; 
epispore finely and rather sparsely echinulate, 1-1-5 mmm. thick, pale 
yellow, with 3-4 scattered germ-pores on one face; a few hyaline capitate 
paraphyses sometimes present. 
III. Teleutosori amphigenous, scattered, when 0-5 mm. long, or con- 
fluent and linear, frequently reaching a length of 2-3 mm., black, bullate, 
compact, long covered. Teleutospores elongate-clavate, often cuneiform, 
x 11-20mmm.; apex truncate, darker in colour, thickened, up 
to 7mmm., and crowned with a variable number (5-8) of curved, digi- 
tate a variable in shape and size, frequently reaching a length of 
10mmm., base attenuate, basal cell longer, narrower, and much lighter 
in colour а the upper; = or slightly constricted at the septum; epi- 
spore smooth, yellowish-brown, 1-1-5 mmm. thick, cell-contents vacuolate ; 
oe persistent, coloured, aa. thick: а continuous with the spore, up to 
mmm.; germ-pore of upper cell apical, obscure, basal pore midway 
betwen septum and pedicel, obscure. 
sts :— 
Avena sativa L. On leaves and sheaths. Herb. Nos. 232, 301, 327. 
П, ПІ. Waikanae Dhol ier n), R. Waters! 24 Nov., 1920. 
Ruakura (Auckland), G. H.C. 28 Feb., 1921. 
21—Trans, 
