Marcu, 1914.| THE ORCHID REVIEW. 69 
The second tube contains a culture made in the same way with the 
seeds of the same plant, but which has been inoculated for two and a-half 
months with a fungus found on the roots of Odontoglossums. The fungus 
has developed, forming on the surface 
of the nutritive jelly a delicate network 
{invisible in the photograph), and it 
has also affected the seeds, for one can 
see well that all these are germinating 
in a regular manner, and contrast by 
their development with those in the 
neighbouring tube. 
The third tube in the photograph 
need not concern us here. It contains 
a single seedling Phalanopsis, de- 
veloped from a seed sown seven 
months previously on a piece of 
-cotton-wool dipping at the base into 
a nutrient fluid in which the fungus 
‘mycelium has developed. 
M. Bernard remarks that the pre- 
sence of the fungus in the house is as 
indispensable as in his culture tubes, 
and he believes that non-success is 
often due to the absence of the 
necessary fungus. He has always 
‘found fungi in the young seedlings 
sent to him by growers, as well as in 
‘seedlings collected in their native 
homes. The tungi which succeed with 
‘Cattleyas and Cypripediums do not 
work at all in the case of Odonto- 
glossums. The cultures were obtained 
from the roots of Odontoglossums, 
-and even these varied considerably in 
their activity, some bringing about 
rapid germination while others had no 
appreciable effect. M. Bernard is of 
‘the opinion that Orchid amateurs will 
one day see the utility of a suitable laboratory for such horticultural 
research. But we are more inclined to lay stress upon correct cultural 
‘conditions in the house, for the fungi are presumbly present wherever 
‘Odontoglossums are grown. 
