Re: Iris pseudacorus
I. pseudacorus is one of my favorites. It, along with its hybrids can handle
the worst of our weather. I find the blooms beautiful and the genetics
fascinating.
I'd like to see more studies done on the growing conditions where it has
(and hasn't) become invasive. From simple observation, I suspect that in a
number of areas where it's become a pest, it's simply taking advantage of
something in the runoff and might be doing a good job at filtering a lot of
this out of the water.
I doubt that its ability to set a huge amount of seeds is the major reason
it's taken off in some areas since large parts of the same waterways (at
least in our area) have no pseudacorus at all.
As with any plant (or animal), I'd bet that a number of factors are at play
any time one population crowds out another.
Christy
Skip & Christy Hensler
THE ROCK GARDEN
Newport, WA
http://www.povn.com/rock/
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