Bermuda buttercup

spoted in the frontier of the protected area and has a very bad reputation:
"Invasive speciesIndigenous to South Africa, Oxalis pes-caprae, the "Bermuda buttercup", is a highly invasive species and noxious weed in many other parts of the world, including the United States (particularly coastal California), Europe, Israel and Australia.[2]
http://www.google.pt/url?sa=t&rct=j&q=oxalis%20pes-caprae&source=web&cd…

[edit] ControlThe plant has a reputation for being very difficult to eliminate once it has spread over an area of land.[3] The weed propagates largely through its underground bulbs and this is one reason why it is so difficult to eradicate, as pulling up the stems leaves the bulbs behind. Soil in which the plant has grown is generally filled with small bulbs. Another reason is that the seeds are tiny, hard, and sticky when ejected from the follicle. If they stick to an animal or vehicle, they may be carried far without detection (Africa).[citation needed]

Kluge & Claassens (1990) reported a potential biocontrol agent using Klugeana philoxalis, a larval feeder on shoots of O. pes-caprae.[4][5]

O. pes-caprae is also a host to broomrape, though it is not clear that that is of significance as a control agent"

so one more invasive in a place here is "forbiden" to be