858 MISCELLANEOUS NOTES AND OBSERVATIONS. 
I visited the pond in the middle of April this year, and 
found many small plants of Azolla scattered all about over 
the surface of the water. 
On visiting the pond again at the end of May, I found 
thousands of plants, chiefly of a reddish colour, some of the 
larger specimens having turned green, all over the surface 
of the pond. 
It is wonderful to what an extent they have increased in 
so short a time, and it shows how careful one ought to be in 
introducing such rapidly inci'easing plants into new localities. 
The pond is almost covered with duckweed, and it will be 
interesting to see which plant dominates. 
Last winter was a very severe one, so this species of Azolla 
is, apparently, quite hardy. — F. H. Barclay. 
