THE GOLDFISH AND ITS CULTURE. 49 
As an interesting point it might be stated here that the 
fanworts sleep after dark. In this condition they fold their 
leaves and lay them in an upright position close to the stems. 
I introduced this beautiful sub-tropical plant twenty years ago 
from Florida, 
THE COMMON FANWORT. 
(C. Caroliniana.) 
This is also a very beautiful and useful aquarium plant, but 
it has no peculiarity of its own, being in color the ordinary 
green observed on any plant. It was introduced by the U. S. 
Fish Commission fifteen years ago, for carp-ponds, from South 
Carolina. It is evergreen in the aquarium like the preceding ; 
grows very easily from cuttings, especially when forked joints 
are selected for the purpose. 
MULERTT’S LUDWIGIA. 
(Ludwigia Mulertti@ ) 
The leaves of this plant resemble in shape and size that of 
a rose-leaflet ; they are borne opposite on a round stem; the 
color differs on different parts of the plant. Old leaves are 
dark green above and violet crimson underneath; young leaves 
are sometimes a brilliant light green, at other times a bright 
pink, In several instances I saw the entire plant, stems in- 
cluded, in all the tints of crimson, from the most delicate hues 
to the deepest shades. The individual leaves and the habit of 
the plant is very graceful; there is no stiffness about it, each 
leaf being shaped, curved and turned in a different manner. 
Especially striking is the effect when some of the dark green 
leaves are partly turned over and display some of the crimson 
of their under side. Being of tropical origin (Valley of the 
