Just to fill everyone in on this plant I have added a few highlights to some information I have come across:
1. It is only food source for Monarch Butterfly Larvae
2. Is poisonous if ingested in large quantities and is generally distasteful to animals and will only be eaten if there is no other vegetation available.
3. Is a native plant to Canada, United States, and Mexico.
http://www.plants.usda.gov/core/profile?symbol=ASSY
4. Was added to the Noxious Weeds act in 1990's as it is a semi-aggressive spreader, and did nit have a method of control at the time. (We now have chemicals that can remove this plant from crops)
5. Low number of recorded incidents of livestock loss in 1949, a herd of 12 sheep ingested the plants as it was during a bad drought and was the only available food source at the time.
6. Is currently in research as an alternative crop with the floss from the pods being used as a hypoallergenic filler for blankets and coats.
7. Indigenous people used the floss to line the baskets they carried their children in.
8. Ontario government removed this plant from their noxious weeds list in 2014, with support from the Canadian Environmental Law Association.
I can post links to the above points if anyone wants to look it up themselves, also by taking this plant off the noxious weeds list doesn't mean everyone everywhere is going to plant it.
It's more of an update to an outdated list that takes in current trends we are seeing in the world, i.e the devastation of monarch butterfly populations.
In summary, what we know now is more than what we knew back in 1990, and the pros outweigh the cons now.