982 LORENZ: REPRODUCTION IN NEW ENGLAND FRULLANIAE 
or from the row or two of cells just within. A single favorable 
leaf may have eight or ten marginal cells in various stages of 
division, making quite a border, besides one or two entire shoots 
with more or less developed leaves. (Fic. 1, B.) The largest 
number of cell masses counted by the writer upon any one leaf is 
seventeen, but these were not all marginal. (Fic. 1, C.) 
A marginal cell first becomes more or less pigmented with red- 
brown, or rather, with burnt sienna mixed with a very little 
carmin lake and just a touch of black, so that it is strikingly con- 
trasted with the clear green of the rest of the leaf; or if upon red 
# plants, the color becomes still deeper and richer. The cell wall 
thickens, and the cell expands and projects beyond the margin to 
some extent. (F1G.2,A.) It first divides by a wall perpendicular 
to the margin, making two approximately hemispherical cells. 
These divide next in a plane about in line with the margin, but 
this is not a continuous line, so that the four resulting cells are 
the 
URE 2. A, margin of leaf with cells in various stages of division: note se 
cell that has been compressed by its neighbors; 250. B, further developed 
mass, showing triangular apical cell in center, 250. 
not all of quite the same size. They in turn divide in a plane about 
parallel to the leaf surface. One of the outer cells cuts out 4 
three-sided pyramidal apical cell (1c. 2, B), and the leafy shoot 
arises directly from this, without having first become detach 
from the leaf and while the leaf is still growing upon the plant- 
The lobules bear, with equal frequency, cell masses and shoots 
either upon the top of the hood or about its mouth. (FIG. 3 A, 
B.) A few hoods had shoots so well developed that several of the 
upper leaves had hoods of their own. (Fic. 3, C-) 
The first leaves on the shoots are mere rudiments, bute: a 
ceeding leaves are increasingly developed, and underleaves 5007 | 
