[APWG] Jewelweed

[Karen Blumer]

Katie,

It (orange I. capensis) certainly can take over entire areas here in  
the east. It has become invasive on the hills and dales of my own yard  
on Long Island, NY - not a wetland but extension of mesic Appalachian  
oak-hickory woodland association. I have seen it in huge patches  
interspersed with Eupatorium purpureum upland of wetland edges in  
suburban lawn settings around here -- attractive but in definite  
monocultures, or I guess with the Joe pyeweed, duocultures. I'll be  
more on the lookout for it in its natural habitat. I don't recall it  
being dominant or invasive there.

Karen

Karen Blumer
Ecosystem Based Management Projects
15 Dickerson Drive
Shoreham, NY 11786
631-821-3337
growingwild at optonline.net

On Jul 18, 2011, at 8:46 PM, Katie Fite wrote:

>
> Has anyone had any experience with jewelweed (Impatiens) native to  
> the eastern U. S. becoming weedy in valley marsh habitats in the  
> intermountain West?
>
> I see that jewelweed Impatiens capensis (orange jewelweed) is listed  
> as a King County  (WA) “Weed of Concern”.
>
> This species is shown as having a yellow flowered form, which is  
> what we are seeing.
>
> http://www.kingcounty.gov/environment/animalsAndPlants/noxious-weeds/laws/list.aspx
>
> Katie Fite
> Western Watersheds Project
> katie at westernwatersheds.org
>
>
>
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