goatgrass (Aegilops cylindrica)
http://www.agf.gov.bc.ca/cropprot/weedguid/joingoat.htm

http://www.intl-pag.org/pag/10/abstracts/PAGX_W243.html
NATURAL GENE INTROGRESSION BETWEEN PLANT SPECIES

I gave you an example of a noxious weed and a common crop but
intercrossing between monocot species is not rare at all.

Oz wrote:

writes

There are weeds that can intercross for example with wheat

There is? Can you give me an example and if possible a reference?

--
Oz
This post is worth absolutely nothing and is probably fallacious.
Note: soon (maybe already) only posts via despammed.com will be accepted.