Interesting question. I was in the field a few days ago marking and
identifying stumps left after a trespass. A few were cut at grade and I
could measure single stump size (d or c) at grade. But it was very obvious
that these 6-8" diameter stumps were really made up of two stems with a bark
seam across the middle of the stump and that these were probably two 3-4"
separate stems at 12-18" height.
Especially if there are multiple stems these might be described as "clumps"
in the US nursery trade and again especially if they are shrubby or small
tree species like Betula. The ones I was looking at were Acer rubrum and
later on in life say +40 years those stems would be pressed together much
higher above garde and the maore mature specimens would brobably be described
as 2 or 3 or 4 or whatever stem or leader trees.
Any of these are distinguished from single stems arising from the ground and
then breaking into seprate branches of that stem.
Later in the same day on another site I looked at a 30" stump cut at grade.
With a cut, Norway maple log partially covering it. But there was a wild
cherry (Prunus serotina) re-sprout on one side of the stump and Norway maple
re-sprouts on the other. I rolled the cut log out of the way and used a
broom to sweep the stump clean. And there was the bark seam across the
middle of the stump! Client and I counted 47-50 rings in the maple stump.
So that many years ago these were two separate seedling sprouts probably a
foot apart. Not even a clump. And some years later theybecame pressed
together at grade and gradually above grade as well. The cleint never had
any idea it was anything but a two stem tree. Another observer would have
immediately seen they were two trees of separate species.
So I think there are various labels, depending on both time and the
labeler... the nursery trade lable might be different from the botanical
label or the forestry label.
SC
----- Original Message -----
From: John Cooban
To: UK Tree Care
Sent: Tuesday, October 02, 2007 6:35 AM
Subject: Co-emanating trees
Hello
Is there any concensus on preferred/correct terminology for two or more
trees (same or different species) each on their own roots, that have grown
from essentially the same point - or so closely together that they can only
be measured as having a common circumference near ground level?
Any offers gratefully received.
Regards
John Cooban
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