Leaf drip

John Hewitson John_Hewitson at compuserve.com
Wed Nov 12 16:13:15 EST 1997


The leaves are falling here in England too.  All at once, with the first
frosts of the winter this last fortnight.

Under our Wallnut trees (Juglans regia) I find there is no moss growing
amongst the cobbles until outside the leaf-drip zone where a healthy carp=
et
of moss has grown.  I doubt whether this is due to lack of light (the
lowest branches are 10 ft up), I suspect that the amount of moisture is n=
ot
very different either.  I have observed this under Holly (Ilex aquifolium=
)
too, where Winter aconites (Eranthis hyemalis) do not grow under the tree=

until clear of the leaf-drip.  Aconites do however grow under a Beech tre=
e
(Fagus sylvatica).

Is this a well known fact, if so what is the explanation.  Otherwise, wha=
t
do you think?  Are there inhibitory chemicals in the water dripping off
SOME leaves?


 _________________________________________________________________
| Dr. John Hewitson                                               |
| Berrystead Barn                   +44 (0)1832 272 209 phone/fax |
| Oundle,                                                         |
| Peterborough, PE8 4DY, UK.  e-mail John_Hewitson at compuserve.com |
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