454 
NOTES ON UROMYCES AMYGDALI, COOKE, 
the form under consideration. His Uromyces amygdali is simply 
the uredo-stage of Puccinia pruni. 
Description. 
It only remains now to conclude with a description of the 
fungus as found in Australia. 
Uredospores. — Sori hypophyllous, small, light brown to rusty 
brown, roundish, scattered but grouped in patches, often con- 
fluent, soon naked, pulverulent, seated on yellow spots corres- 
ponding to those on upper surface. 
Uredospores variable in form, from elongated-ovate to almond- 
shaped, usually shortly stalked, but sometimes 22 fx in length, 
closely echinulate, yellowish, apex yellowish-brown, thickened, 
with spines less prominent, bluntly conical or rounded, with at 
least two opposite germ-pores situated just behind thickened apex, 
26-44 x 12-20 fx, intermixed with numerous capitate, pale yellow, 
long-stalked paraphyses, sometimes attaining a length of 60 p. 
Teltu to spores. — Sori scattered or confluent, isolated or in 
groups, punctulate, pulverulent, seal-brown, known from the other 
by their dark almost black appearance. 
Teleutospores composed of two spherical cells, apparently 
flattened at their junction, lower usually smaller and paler than 
upper, but sometimes similar in size and colour, sharply con- 
stricted in the middle and cells readily separating. Epispore 
uniformly thick, dark brown, thickly studded with short stout 
spikes, 25-37 x 17-21 fx. Pedicels short, hyaline, deciduous or 
persistent, from 4 to 8 ^ long. 
On leaves of peach, nectarine, plum, apricot and almond, and 
occasionally on fruits of peach and apricot : December to June. 
New South "Wales, Victoria, Queensland, S. Australia and 
Tasmania. 
Synonyms. 
Puccinia pruni-spinosce, Pers. (1797). < 
Uredo prunastri, DC. (1805). 
Puccinia prunorurn, Link (1825;. 
