60 British Uredinee and Ustilaginee. 
Uredinee. These permeating mycelia, whether of the 
Uredinee or Ustilaginee, are perennial. When the plant, 
if perennial, dies down in winter, the mycelium, of course, 
dies down with it, but remains alive, although quiescent, 
in the upper part of the root-stock ; and when fresh shoots 
are sent up in spring, the mycelium is sent up in them. 
One peculiarity of most of the Ustilagineous mycelia is 
that, although it pervades more or less the whole plant, 
it produces its spore-formation at certain favoured places 
only ; these are, for the most part, in the flowers or seeds 
of the plants, but not always, sometimes on the stems or 
in the leaves. The place of spore-formation, however, is 
constant with each species. If a plant affected with one 
of the Ustilaginee be transplanted into a garden, it will, 
year after year, be affected with the parasite. In my own 
garden at King’s Lynn I have had growing for the past 
six years, plants of Colchicum autumnale affected with 
Urocystis colchicd, Triticum repens with U. hypodytes, and 
Avena elatior with U. segetum. De Bary mentions that 
a plant of Saponaria offcinalés, in the Freiburg Botanic 
Garden, was for more than ten successive years affected 
with U. violacea. 
