9 Transactions. 
I. Aecidia hypophyllous and petiolicolous, crowded in small groups 
. B 
up to 5 mm. diam., seated on somewhat inflated areas, orange. Peridia 
cylindrical, up to 2 mm. high, 0-1-0-3 mm. diam., margins slightly ex- 
panded, not revolute, white, finely laciniate. Spores globose or elliptical, 
18-28 x 15-23 mmm. ;* epispore hyaline, densely and minutely verruculose, 
1-1-5 mmm. thick, cell-contents granular, yellow. 
П. Uredosori amphigenous, scattered or crowded, seated on pallid spots, 
linear, 0-5-1 mm. long, orange-yellow, pulverulent, surrounded by the 
ruptured epidermis. Spores subglobose, elliptical or obovate, 28-32 x 
23-26 mmm. ; epispore hyaline, finely and closely echinulate, 1-1-5 mmm. 
thick, cell-contents granular, orange-yellow ; germ-pores scattered, 6-8, 
conspicuous. 
ПІ. Teleutosori amphigenous, chiefly hypophyllous, and culmicolous, 
slightly constricted at the septum; epispore smooth, chestnut-brown, 
1-5-2 mmm. thick in the upper cell, 1-1-5 mmm. in the lower ; pedicel 
persistent, hyaline, tinted beneath the spore, short, up to 15 x 6 mmm. ; 
germ-pore of the upper cell apical, obscure, basal pore immediately beneath 
X. Mesospores not uncommon, elongate-elliptical, up to 40 x 12 mmm. 
Hosts :— 
Deyeuzia Forsteri Kunth. On leaves and culms. Herb. No. 739. 
П, III. Lake Harris track, Otago, 650 m., W. D. Reid! 6 May, 
1921 
Triticum vulgare Vill. Herb. No. 1268. Ruakura, Auckland, A. W. 
Green! 9 Jan., 1922. 
Distribution: Europe; Asia Minor; Japan; North and South America ; 
Australia. 
One host is indigenous and widely spread throughout; it occurs also 
in Australia and Tasmania (Cheeseman, 1906, p. 868). The other is widely 
cultivated throughout the world. 
Were known to occur on several hosts; but until the necessary cultural 
work had been performed by Arthur apparently no attempt had been 
and the synonymy given above taken from his paper in North American 
a, , 
hosts (all belonging to the family Ranunculaceae) and ninety-three telial 
hosts belonging to the Poaceae. 
The genus Rostrupia Lagerh. was based on abnormal 3—4-сеПеа forms 
of the teleutospores of this species. 
It may be mentioned that Arthur includes here P. agropyrina Erikss. 
and P. triticina Erikss., two races formerly included under P. dispersa 
Erikss. et Henn. Although not sufficiently differentiated to Separate as 
distinct species, these two forms may in the uredo stage be separated on 
account of the ferruginous colour of the uredosori. 
* In this article the contraction “ mmm." is used for '  micromillimetres." 
