g'day again david,

here is a link that may give you and others some insight about the
norfolk island pine, can't find any reference to there being different
plants as far as i know it is a single species plant they do say it is
not a true pine (i learnt something hey) and like lots of big trees if
they get damaged and grow new growths these growths are less stable
and tend to break off easily and could do lots of damage, anyhow you
can read that.

i did find one sight that dressed up the information to make it look
like the plant would be a good long term pot culture but you all know
now that, that isn't the case hey?

http://en.wikipedia.org/wiki/Norfolk_Island_pine

len

snipped
With peace and brightest of blessings,

len

--
"Be Content With What You Have And
May You Find Serenity and Tranquillity In
A World That You May Not Understand."

http://www.users.bigpond.com/gardenlen1