334 Ward. — Recent Publications bearing on the 
A. Ectotrophic Mycorhizae (i. e. the fungus is entirely 
outside the cells of the root). 
(1) The ordinary coral-like Mycorhiza of the Cupuli- 
ferae, &c. 
(2) A long, branched Mycorhiza with hair-like out- 
growths found on beech the outgrowths consist of hyphae 
only. 
(3) A somewhat similar form on Pinus Pinaster , but 
the outgrowths consist of rootlets covered with hyphae. 
B. Endotrophic Mycorhizae (i. e. the hyphae enter and 
live in certain cells of the root). 
(4) The Mycorhiza of Ericaceae. 
(5) The combination of fungus and roots found in Orchids, 
and described by Wahrlich 1 . 
It is not necessary to describe in detail the new forms, 
but I will state what seem to be the most important points. 
The form (2) on the beech was found once, and it resembles 
at first sight an ordinary branched root — i. e. the growth 
in length is not interfered with, and so the 4 coral-like ’ 
thickening does not occur. It appeared to be clothed with 
a dense pile of root-hairs. The microscopic examination 
showed that it was clothed with a dense thick coat of 
mycelium — the thickness equal to half the radius of the 
root — and that the apparent root-hairs were strands of hyphae 
radiating out from this covering. These free strands were 
peculiar in the hyphae, being parallel in one plane, and thus 
forming flat bands. Some were as long as to 2 mm. The 
hyphae fuse with the particles of soil as do root-hairs. 
The Mycorhiza of Pinus Pinaster (3) is superficially some- 
what like the last, but the radiating filaments which look 
like root-hairs are coarser, and in this case turn out to be 
true lateral roots , but so fine and closely packed that they 
look like root-hairs. Some were 3 mm. long and o-i to 
0-135 mm. thick. Each of these hair-like rootlets was covered 
by a relatively very thick felt of mycelium. The above 
1 Bot Zeitung, 1886. 
