KUEHNEOLA 299 
thin-walled paraphyses; spores ellipsoid or ovate, sparsely 
echinulate, yellow, 21—24 x 18 p. 
Uredospores. Sori hypophyllous, small, scattered, pale- 
orange, surrounded by thin-walled clavate paraphyses; spores 
roundish or ellipsoid, sparsely echinulate, yellow, about 21 x 
18 »; pores obscure. 
Teleutospores. Sori similar, but black; spores cylindrical, 
of 6—10 (mostly 7 or 8) cells, slightly tapering at the apex and 
papillate, not constricted, rounded below, verrucose, brown, 
80—135 x 28—35 «; three germ-pores to each cell; pedicels 
very long, thick, colourless, persistent, swollen towards the base. 
On Rubus Idaeus, and possibly on other species of the 
genus. Not uncommon. June—October. (Fig. 226.) 
Lecythea gyrosa of Berkeley is the ceeoma-stage, in which a pulvinate 
ring of spores is formed round the little group of spermogones, leaving the 
centre, at tirst sight, apparently unoccupied. This form is not confined 
to the early part of the season, but may be found as late as August or 
September. It is much rarer than the other spore-forms. 
Although this Phragmidium is not found in America, there is a very 
similar one, P. imitans Arthur, on allied species of Rubus, inhabiting 
the United States and Canada, in which the comata are similarly formed. 
On the cultivated Raspberry, when this disease is present, it can be 
prevented from spreading by spraying with potassium sulphide solution or 
dilute Bordeaux mixture. All diseased leaves should be burnt. 
DISTRIBUTION : Europe, Siberia, Japan. 
KUEHNEOLA Magnus. 
Auteecious. 
Spermogones subcuticular, somewhat flattened, without 
ostiolar filaments. Uredo-sori of two kinds: primary, ie. the 
equivalent of the ceomata, often surrounding the spermogones, 
without paraphyses; secondary, similar, but scattered, some- 
times with paraphyses; uredospores borne singly on pedicels, 
with few and inconspicuous equatorial pores. Teleutospores of 
o 
