204 Johnson . — On the Nursing of the Embryo 
its under side suckers are produced which, piercing the 
phloem, are distinguished by their size and width, and to this 
extent remind one of those of Viscum. They possess an 
axile wood mass ; a meristematic zone, which was possessed, 
perhaps, originally, was not observed. The whole tissue of 
the haustorium is distinguished, like that of Viscum in its 
young state, by its green colour, and has scattered through 
it innumerable star-like calcium oxalate glands.’ I have been 
able to confirm this account by examination of a region of 
attachment, three-quarters of an inch in diameter. The 
sucker -outgrowth (the intra-matrical part of the primary 
haustorium) is not, as seen in cross section, like a wedge 
driven into the host wood, but, to use a simile elsewhere 
employed by Solms-Laubach, c like a saddle on a horse's 
back,’ with large lateral flaps. From the under (concave) 
surface of this sucker-outgrowth a large number of suckers 
are given off penetrating the host-wood like medullary rays, 
even to the pith. The connection of the xylem elements of 
the suckers with those of the host is very common. 
