Don't ask me for a specific example, because my memory's just not that good.
But I have seen a VERY few exceptions [remember, I see HUNDREDS of Phal
spikes each season] and it seems to me that they were among the "oddball"
novelty types. For the most part, however, I think you have come up with a
good "rule of thumb." Kenni

"Steve" wrote in message
...
J Fortuna wrote:
Burr,
...............................................I n general roots and spikes
can come out of the same kind of location on the plant, and the direction
where they head does not differentiate them either......................

Hi Joanna,
Tell me if you agree with this, or if you have seen a clear exception to
this "rule":
Spikes form on the trunk in a position parallel to the leaves on one side
or the other. A new growth in that position can still be either spike or
root but something new growing in a different position around the trunk
has to be a root.

Steve