56 
If the plants are capable of a restricted underground growth 
only, they will not occupy the entire muddy floor of the marsh, 
A single individual will be formed from a seed or from a runner 
out in the clear water a few inches or a few feet from the parent, 
This plant will send up its leaves and flower stalks the first year, 
then the second year, leaves and flower stalks will arise fro om 
which is pierced by the numerous living branches which in turn 
die and add to its height and diameter. The coarse leaves droop 
down over the sides of the clump to give the characteristic ap- 
pearance. The increase and multiplication of the tussocks is so 
slow that the swamp is not entirely converted into solid ground, 
and one may often traverse such a marsh by stepping from one 
tussock to another when the Tae spaces are occupied by 
mud and water to some dept 
mong the more common species which form tussocks, are to 
be ee the sheathed ee (Eriophorum vaginatum), 
the tufted clubrush ( Scirpus cacspitosus) and the tussock sedge 
small portion, still free, shows the formation. The photograph 
from which figure 12 was made was taken after a snowfall which 
had melted from the tussocks but still lay upon the ice among 
them 
MOSSES IN APRIL. 
e keen winds of March and the fires which have burned and 
blackened the grasses in many parts of the Garden, have shriv- 
eled and scorched many of the mosses that grow in the open. 
The bright rosettes of the Catharineas are curled up and brown, 
its “bristling spears’? have lost their caps and lids, the ae 
walls are dull and shrunken, and oy leaves are twisted and 
Its first cousin, the “ Beard Moss” (Pogonatum tenue), ae 
ows in such abundance on the banks of the road skirting the 
pond near the Blue Bridge also begins to show that its days are 
