One of the additional benefits of allowing your native wildlife garden to establish itself is the opportunity to actually see what is present in your lot, garden or otherwise meticulously manicured lawn.  Fact is many plants may never have a chance to show themselves, simply due to the fact that they are being mowed down, or chemically neutered.   My feeling is remove what you GOT, not what you think you got and the world will be a better place. 

For instance, there has been a Multi-Flora Rose Bush on my property since I purchased it - my neighbors say they remember it for over 20 years ago; yet at no more than three feet in diameter, it has got to be one of the worst performing alien intruders to terrorize this region - so it makes up for it poor performance in world domination by having pretty flowers that everyone comments on.  [side note: I have informed Mr. Bush if he should demonstrate any sudden urge to take over the neighborhood or collapse our economy, I would have no choice but to remedy the situation with "extreme prejudice" in the ideal to protect our way of life for future generations.]

Below are some of the "NOXIOUS WEEDS" that we are on the prowl to look for.  Additionally in the words of some state conservationists, if you find a plant on the list simply pull it out (root too) before it seeds.  The underlying idea is control and abating further growth, not sanitizing the country side.  This does not mean that the entire garden needs to be burned, treated as a hazmat site, or even surrounded by State Officials and terminated with extreme prejudice (though I have no doubt some would imply this).

To help you with identifying some of Pennyslavania MOST WANTED, we have assembled PICTURES to go with the Noxious Weed Control Committee established noxious weed control list:

(1) Cannabis sativa, commonly known as marijuana.	(2) The Lythrum salicaria Complex: Any nonnative Lythrum including, Lythrum salicaria and Lythrum virgatum, their cultivars and any combination thereof.
(3) Cirsium arvense, commonly known as Canadian thistle.	(4) Rosa multiflora, commonly known as multiflora rose.
(5) Sorghum halepense, commonly known as Johnson grass.	(6) Carduus nutans, commonly known as musk thistle.
(7) Cirsium vulgare, commonly known as bull thistle.	(8) Datura stramonium, commonly known as jimson weed.
(9) Polygonum perfoliatum, commonly known as mile-a-minute.	(10) Puerria lobata, commonly known as kudzuvine.
(11) Sorghum bicolor cv. drummondii, commonly known as shattercane.	(12) Heracleum mantegazzianum, commonly known as Giant Hogweed. [ED: handling this is TOXIC and it should not to be confused with Queens Anne Lace because this plant is HUGE!]
(13) Galega officinalis, commonly known as Goatsrue.

Hope this list helps and remember that it is about restricting the growth of these plants - on their own they generally do nothing to the area, the region or national security.