Outlaw weeds?
What do they look like?
My definition of "Outlaw Weeds," is just a generic term for plants that are on a "government hit list" to exterminate them.
"Legislation to outlaw the movement of specified noxious weeds."
"Under the Federal Noxious Weed Act of 1974 , the Secretary of Agriculture has the authority to prohibit the importation and interstate transportation and sale of species that the Secretary has deemed noxious through actions such as inspection and quarantine. The Secretary is allowed to seize, treat, destroy and dispose of items that have been contaminated with a noxious weed."
"The local government of Pretoria has sent out weed inspectors to impose $900 fines on those who fail to rip out jacaranda seedlings, although large adult trees will be allowed to remain."
Outlaw Weeds I suppose it would be any plant on your governments (federal, state, local) that is controlled in some way.
A List of noxious weeds in Nova Scotia
1 Class Number One weeds--capable of spreading from the source to cultivated or pasture lands
Abutilon theophrasti (velvetleaf)
Anthriscus sylvestris (wild chervil)
Asclepias syriaca (milkweed)
Convolvulus arvensis (field bindweed)
Cyperus esculentus (yellow nutsedge)
Euphorbia esula (leafy spurge)
Lychnis alba (white cockle)
Senecio jacobaea (tansy ragwort)
Stachys palustris (woundwort)
2 Class Number Two weeds--capable of inflicting economic loss or ill health on people within the Province
Datura spp. (thorn-apple)
On the other hand California has over 160 plants listed in these categories:
A Noxious weed and noxious weed seed: eradication, containment, rejection, or other holding action at the state-county level. Quarantine interceptions to be rejected or treated at any point in the state.
B Noxious weed and noxious weed seed: eradication, containment, control or other holding action at the discretion of the commissioner
C Noxious weed and noxious weed seed: state-endorsed holding action and eradication only when found in a nursery; action to retard spread outside of nurseries at the discretion of the commissioner; reject only when found in a cropseed for planting or at the discretion of the commissioner. Designated noxious weeds in the CA Code of Regulations.
Q Noxious weed and noxious weed seed: temporary "A" action outside of nurseries at the state-county level pending determination of a permanent rating.
In the U. S. you can't transport certain plants into a state. Until recently the State of California had inspection stations where certain fruits were not allowed into the state.
Of course
Cannabis is illegal in most countries ( I believe, there is some type of U. N. treaties regarding it). At one time
Cannabis was a required plant to grow. Cannabis is starting to make a legal come back
for Hemp: A New Crop with New Uses for North America*