290 
than the bladder, and are very slender branching filaments (Figs. 
€, £), somewhat like those figured in Reichenbach for U. minor, 
but with branches more slender and more numerous. The figure 
and the specimens agree in that the base of the flowering stem 
sends out two kinds of simple or nearly simple branches, one 
bearing only leaves, the other, more slender, bearing the bladders. 
In the fresh specimens these latter branches are seen to be fur- 
nished with leaves also, but these are smaller and more distinct 
than on the other branches. And the bladders, in fact, develop 
on these more scattered leaves, some of the leaf divisions always 
remaining distinct. This also is not well shown in Reichenbach’s 
figure. 
The hibernacular buds, finally, in this species may occur either 
on the leafy branches or on those with bladders. There is gen- 
erally one, rarely more than two, on a plant, so far as appears 
from the specimens in hand. And they are always on a naked 
stalk or branch one to two inches long. 
In the close observation of the presence, structure and develop-— 
ment of the hibernacula in the different North American spécies 
of Utricularia, there is open an inviting field to some enterprising 
field botanists favorably located for such a task. 
Explanation of Plate CXLI. 
Utricularia intermedia. 
a. A plant, reduced y. 
b. Leaf, enlarged. 
c. Scale from bud, enlarged. 
d,e. Bladder-bearing leaves, enlarged. 
Notes on Nasturtium Armoracia. 
By CuHarues A. DAVIs. 
Three years ago the attention of the writer was incidentally 
attracted to this plant, and a series of observations was made on 
the occurrence on it of pinnatifid leaves, the results of which were: | 
published in the BuLLETIN. va: 
Since that time the plant has been the source of much interests oo 
from various structural peculiarities, of which no previous study : 
