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topophysis


Kitty,

          Found it.  Dirr tells us: "Typophysis is the term applied to
different growth characteristics when different parts of the plant are used as
cuttings.  Orthotropic refers to cuttings that grow vertically; plagiotropic
to those that grow laterally."  This phenomenon is especially distinct in
Taxus cuspidata var. capitata, Picea pungens var. glauca, etc.  A case where
nature dominates over nurture.

                                                                             
                    Josh

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