208 
Hill and de Frame. — On the 
Pinus contorta var. Mur ray an a and P. montana var. gallic a, and agrees 
with the short description given by Gerard, 1 so that the table at the end of 
this paper, showing the relationships between the cotyledons and the root- 
structure, will indicate sufficiently well the vascular rearrangements observed. 
The following three seedlings require a more detailed description. 
Series G. Six seed-leaves were present, of which two were subsidiary, 
two showed the bifurcation and rotation of the bundle very clearly and one 
underwent a similar but very unequal division. The smaller portion of this 
unequally bifurcated bundle died out, and the remaining part eventually 
combined with the strand of the adjoining half-cotyledon and formed one 
pole of the root. This is similar to what occurs in some seedlings of 
P. contorta and P. insignis . 
Series H. The behaviour of the seed-leaf- traces of this seedling was 
of a complex character, and is illustrated in the accompanying Diagram 7. 
The bundles of the seed-leaves showed various vascular rearrangements ; 
it will be observed (Diagram 7, Fig. 1) that the bundles a , #, and e are 
endarch ; d has its protoxylem turned towards e, and there is a resin duct 
immediately lateral to it ; c,f> and g show the bundles to be bifurcated, but 
very unequally, and, in the case of g , the bifurcation only affects the xylem. 
1 Gerard : Recherches sur le passage de la racine a la tige (Ann. Sci. Nat., Bot., xi, 1881). 
