236 
Transactions British Mycological Society. 
as to be visible to the naked eye as white points (Pl. XI, | 
figs. 17 d, e). 
covered. 
Pure cultural studies of Myxosporiuwm corticolum have been 
No other form of fructification has been dis- 
CULTURAL STUDIES. 
I. General growth on different media. 
made on various media. 
Medium 
Apple twig 
Pear twig 
Cherry gelatine 
Cherry agar 
Rice 
Potato stem - 
Apple fruit 
Carrot 
Maize 
Cellulose agar 
Malt agar 
Prune agar 
Apple agar 
Effect on colour 
of medium 
Changed from yellow 
to dark brown 
Changed from yellow 
to red 
Changed from white 
to purple-brown 
Changed from orange 
to red-brown 
From yellow to brown 
From yellowish grey 
to brown 
Crimson in centre of 
colony, surrounded 
by band of dark 
green, edge yellow 
The characteristic growth of the 
mycelium, its effect on the medium and any other points of 
interest are set forth in the following table: 
Colour of 
mycelium 
White 
Brown and white 
White on slope cul- 
ture. White and 
brown on roll cul- 
ture 
White on slope cul- 
ture. White, yellow 
and green on roll 
culture 
White 
White 
White and grey 
White and whitish 
pink 
White 
White 
White 
White 
White 
Formation of 
mycelium | 
Hyphae very well develor 
both on cut surface and wh 
they have burst through 1 
bark. Numerous large drops 
amber-coloured to dark-bro 
liquid. Conidia 
Fibrous and not so well « 
veloped as on apple twig. Sm 
quantity of amber-colou 
liquid | 
Good growth of flocculent | 
phae. No amber-coloured liq 
Flocculent hyphae, not so w 
grown as on cherry gelatine. . 
amber-coloured liquid. Shig 
formation of concentric Tir 
when grown on a roll culture 
Flocculent hyphae, surroundi 
each grain of rice 
Inconspicuous growth 
Fibrous and flocculent. A f 
drops of brown liquid 
Good growth. Drops of no 
liquid 
Flocculent hyphae 
Poor growth, thin film of ve 
fine hyphae on _ surface 
medium 
Moderate growth. Large numl 
of small drops of brown liq 
formed. Cracks appear in t 
medium which increase in $ 
and number with age. Conic 
are formed in small cream pi 
tules looking like drops of em 
sion. Later dark green sclero 
are formed containing conidié 
Moderate growth. No drops 
liquid formed 
Flocculent growth. No drops 
liquid 
