329 
to the aie of the particular environment presented by 
Aesculus Pavi 
Other Instances of Woody * Trees Killed by Botrytis.—The 
fungus Botrytis is not infrequently found upon large woody trees 
growing as a saprophyte, and in such Cases is usually confined to 
young shoots and twigs which have been killed by frost, or other 
agency. ats rarely “indeed does it develop in the woody tissues 
of the main stem. “In a few cases the fungus is known as an 
active prnatic upon tess, and then is usually the cause of a 
““die-back’’ of the shoots. In the common “‘die-back’’ of 
conifers due to Botrytis it cannot be said that the fungus attacks 
woody tissues for only the soft and tender green shoots are 
destroyed. and only very exceptionally does the “mycelium extend 
into the older lignified tissues of the branches. In the “ die- 
back’’ of fig trees, roses, and ribes Fiizhes, it is again usually 
the young sappy shoots which are attacked. In these cases, 
however, the mycelium not infrequently develops into the hard 
lignified regions of the branches and occasionally even invades 
@ main stem of the plants. The hyphae extend in a down- 
ward direction, growing most rapidly - the cortex, and gradu- 
ally 2 ee inwards “eventually penetrating all the Gana of 
the plant 
Only hres cases have been described in which in nature 
aaee has invaded a ora hao + the base of the ee, The 
nLag aie The attack commenced at the ground Teva and the 
hyphae spread lla upwards in the tissues eecarieha the 
’ bark in advance of the wood. he invasion occurre ably 
during the winter months and its progress was saftchenthy ‘doe to 
permit of the neighbouring saplings becoming fully leaved whilst 
the baataope trees remained in bud, the buds, however, being 
cortex. The ig ie instance is given in rief account by 
— these burst through the bark and gave rise to conidiophores. 
n 1903 Miss Lorrain Smith* described a disease of the goose- 
ban eaused by Botrytis. The host was attacked at the ground 
level and the bark destroyed ; the mycelium of the fungas. per- 
* Smith, A. L. AY Disease of the Gooseberry. Journ. Bot. vol. xli, 1903. 
: ss 
