690 Transactions. 
New Zealand species, 1 (introduced). 
This genus is separated from Puccinia on account of the peridia being 
absent from the aecidia, and because of the absence of uredospores. The 
teleutospores are peculiar in that they are more or less triangular, the 
base being at one angle formed by the attachment of the pedicel; the 
other angle being formed by the protrusion of the epispore into a short 
projection, at the end of which is the germ-pore. 
1. Gymnoconia Peckiana (Howe) Trotter. (Fig. 76.) Rosaceae (1). 
A. Trotter, Fl. Ital. Crypt., Pars. 1 Fungi., Fasc. 7, Ured., p. 337, 
1910. 
Uredo interstitialis Schlecht., Horae Phys., Berol., p. 96, 1820. Aecidium nitens 
Schw., Schr. Nat. Ges. Leipsig, vol. l, p. 69, 1822. Caeoma luminatum 
i . 61. ] 
» in > 1. 6 1825. Puccinia Peckiana Howe 
Peck, Ann. Rep. N ate Mus., 23, p. 57, 1872. P. tripustulala 
Pe n le Mus., vol. 24, p. 91, 1872 ite 
ek, Ann. Rep. N.Y. Sta A ; 
Burrill, Bull. ll. Lab. Nat. Н ist., vol. 2, p. 220, 1885. Puccinia interstitialis 
Tranz w., vol. 32, p. 259, 1893. Gymnoconia interstitialis (Schlecht.) 
Lagerh., T'romosoe Mus. arsh., vol. 16, p. 140, 1894. — Dicaeoma tripustulatum 
Kuntze, Rev. Gen., vol. 3, p. 467, 1898. Kunkelia nitens Arth., Bot. Gaz., 
vol. 63, p. 501, 1917. 
0. Spermogones amphigenous, scattered, columnar, honey-coloured, con- 
spicuous. 
I. Caeomata amphigenous, chiefly hypophyllous and caulicolous, scat- 
tered or more frequently crowde ; up to 1:5 mm. diam., erumpent, orange- 
yellow, surrounded by the ruptured epidermis. § pores globose to polygonal, 
20-30 x 17-24 mmm. ; epispore 1—1:-5 mmm. thick, hyaline, densely 
Kiss cell-contents bright orange, germ-pores scattered, numerous, 
obscure. 
` 
ч 
B 
thickened, but crowned with 1 or several hyaline papillae, base very irregular 
somewhat triangular, basal cell distorted near the pedicel by a protrusion 
of the wall; epispore covered with a few coarse warts, more prominently 
Host: Rubus fruticosus L. On leaves and stems. Herb. No. 246. ae 
І. Tokomaru (Wellington), б. Н. C. 6 Dec. 1930. 37 
2 Mar., 1921. Helensville (Auckland), E. Bruce Levy. Feb., 1921. BD 
Distribution : North America ; Europe; Asia. S 
n North America two biological forms of this rust occur. The caeoma- : 
spores of one form on germination produce short basidia on which basidio- a 
