The phrase "a weed of" is correct and usable in written English.
It can be used in contexts discussing unwanted plants or metaphorically to describe something undesirable or invasive in a particular situation.
Example: "The garden was overrun by a weed of dandelions that choked out the flowers."
Alternatives: "a nuisance of" or "an infestation of".
Each of these species is listed as a weed of national significance, among the country's 32 most economically and environmentally damaging plant species.
The garden pansy (V. wittrockiana) is a hybrid, one of whose parents is V. tricolor, which is a weed of European grainfields, the other parents being V. lutea and V. altaica.
It is a weed of rice throughout tropical regions and of other cereal crops, sugarcane, and bananas, and has many utilities.
"But I fear in the spirit of doing good we could create a weed of bureaucracy that could wind around our ankles and necks".
In Australia, for example, mesquite is listed as a weed of national significance and legislation does not allow for utilisation (Australian Weeds Committee 2012).
Furthermore, S. acmella is reported to be a weed of rice throughout Indonesia, Bangladesh, India, Philippines, Sri Lanka and Thailand (Moody 1989) found in rainfed and upland fields (Soerjani et al. 1987).
If you call a dandelion a weed versus of flower, it will vary what you do with it.
Already Twitter is growing like a weed because of this opt-out model, as opposed to Facebook's opt-in.
Weedy rice has been a problematic weed of rice in the southeastern United States for well over a century (Gealy 2005).
Cuscuta australis, a native annual holoparasitic plant species to South China, and is considered a noxious weed of agriculture (Yu et al. 2011).
As a conspecific weed of cultivated rice, individuals of weedy rice are commonly surrounded by densely populated crop in the field.
