Orobanche Species, Clover Broomrape, Hellroot, Lesser Broomrape, Small Broomrape

U.S. FEDERALLY LISTED NOXIOUS WEED.
Not allowed for import to the US and not allowed in any interstate or intrastate transportati...Read Moreon without a specific permit from USDA APHIS PPQ (Plant Protection and Quarantine).
No one should be selling/growing this plant in the U.S.

The Broomrapes are fascinating plants, looking rather like a saprophytic orchid. They are leafless, growing entirely as root parasites on...Read More other plants. Many species are root parasites of members of the pea family, but this species is less fussy parasitising many plants, although still preferring the pea family (including clover) as its host.
This is a European species, but has become established as a weed in Australia.