"Invasive" plants

All,

As part of the Wisconsin DNR's Invasive Species Identification, Classification and Control Rule – NR 40, several plant species, some of which are common in the aquarium trade, are to be prohibited, effective September 1st, 2009. "Prohibited" meaning you cannot buy, sell, posess, transfer, raise, or otherwise "use" the species. Those species are:

1. Ampelopsis brevipedunculata (Porcelain berry) including the variegated cultivar
2. Anthriscus sylvestris (Wild chervil) except in Barron, Columbia, Dane, Milwaukee, Polk and Walworth counties
3. Bunias orientalis (Hill mustard) except in Green and Lafayette counties.
4. Cabomba caroliniana (Fanwort)
5. Centaurea solstitialis (Yellow star thistle)
6. Chelidonium majus (Celandine) north of state highway 64
7. Cirsium palustre (European marsh thistle) west of state highway 13 and south of state highway 29, excluding Door county
8. Conium maculatum (Poison hemlock) except Iowa and Grant counties
9. Crassula helmsii (Australian swamp crop or New Zealand pygmyweed)
10. Cytisus scoparius (Scotch broom)
11. Dioscorea oppositifolia (Chinese yam)
12. Egeria densa (Brazilian waterweed)
13. Epilobium hirsutum (Hairy willow herb) except in Kenosha county
14. Glyceria maxima (Tall or reed mannagrass) west of a line formed by state highway 22 from Oconto to Arlington, then state highway 51 from Arlington to the Illinois state line.
15. Heracleum mantegazzianum (Giant hogweed)
16. Humulus japonicus (Japanese hops) except in Grant and Crawford counties
17. Hydrilla verticillata (Hydrilla)
18. Hydrocharis morsus-ranae (European frogbit)
19. Lagarosiphon major (Oxygen-weed, African elodea or African waterweed)
20. Lepidium latifolium (Perennial or broadleaved pepperweed)
21. Lespedeza cuneata or Lespedeza sericea (Sericea or Chinese lespedeza)
22. Lonicera japonica (Japanese honeysuckle)
23. Lonicera maackii (Amur honeysuckle) north of state highway 21 from LaCrosse to Wautoma and state highway 22 from Wautoma to Oconto
24. Leymus arenarius or Elymus arenarius (Lyme grass or sand ryegrass) except in Door, Kewaunee, Manitowoc, Sheboygan and Racine counties
25. Microstegium vimineum (Japanese stilt grass)
26. Myriophyllum aquaticum (Parrot feather)
27. Najas minor (Brittle naiad, or Lesser, Bushy, Slender, Spiny or Minor naiad or waternymph)
28. Nymphoides peltata (Yellow floating heart)
29. Paulownia tomentosa (Princess tree)
30. Polygonum perfoliatum (Mile-a-minute vine)
31. Polygonum sachalinense (Giant knotweed)
32. Pueraria montana (Kudzu)
33. Quercus acutissima (Sawtooth oak)
34. Rubus phoenicolasius (Wineberry or wine raspberry)
35. Torilis arvensis (Spreading hedgeparsley)
36. Torilis japonica (Japanese hedgeparsley or erect hedgeparsley) north of the line formed by state highway 21 from La Crosse to Coloma, north on state highway 51 to Heafford Junction, east on state highway 8 to the Michigan state line
37. Trapa natans (Water chestnut)
38. Vincetoxicum nigrum or Cynanchum louiseae (Black or Louise’s swallow-wort) north and
east of a line formed by interstate highways 90 from La Crosse to Madison and 94 from Madison to
Milwaukee
39. Vincetoxicum rossicum or Cynanchum rossicum (Pale or European swallow-wort)

More information about NR 40 can be found at: http://dnr.wi.gov/in...classification/

The entire package regarding the legislation can be found at: http://dnr.wi.gov/in...eet_package.pdf

Brian

Looking at the length of that list, I am surprised WI has any native plant species left at all. They left off Cogan grass.

Wow, now that's a fantastic list! I only wish other states would put that much thought into it. I am particularly impressed by the species that are allowed in some areas but not in others. I assume it is because these species are less of a problem in some areas than others? I suppose it could be confusing to the average person, but it looks like a lot of thought went into it. At least, a lot more than many other states give.

I'm sure there are a number of species that were left off. I'm surprised that purple loosestrife (Lythrum salicaria) isn't on there. It's a terrible, terrible pest. Nursuries can sell it down here. Makes me grit my teeth whenever I see it for sale.

I assume there is some clause that makes it so you don't necessarily have to go out and eradicate it on your property? I suppose if it is on your property you could be considered to "possess" it. But removing some of these species would be a tall order indeed, and not for the faint of heart.

Yeah, I'm surprised that Purple Loostrife is not on there as well. Neither is Phragmites, which is ravaging the state. Although, that is probably not on there because the DNR is using it for sewage water treatment in some areas of the state. I guess it's "bad" and "invasive" unless the DNR finds a use for it. Hmmmm.

Brian

Yeah, I'm surprised that Purple Loostrife is not on there as well. Neither is Phragmites, which is ravaging the state. Although, that is probably not on there because the DNR is using it for sewage water treatment in some areas of the state. I guess it's "bad" and "invasive" unless the DNR finds a use for it. Hmmmm.

Brian

Maybe it's because they aren't sure how to handle the native genotype vs the European one (that's the one that is invasive).

Could be. I didn't think about that.

Brian