On Nov 23, 5:39 pm, Sean Houtman wrote:
Father Haskell wrote in news:5bd9148d-e25d-415a-
:

In a field of same mother cuttings, where all roots graft
from contact, do they again become one single tree?

Most people would call a tree a single trunk, not a large number of
trunks. It can easily be argued that for instance a field of aspens is a
single plant, composed of a number of trees.

Likewise a bamboo grove, or even a lawn. Likewise
the chestnut trees which were so easily wiped out
by blight. If one tree became infected, so did the
whole lot by transferring the pathogen along the roots.