Rogue weeds defy rules of genetics

I’m no geneticist, but this article from the New Scientist caught my eye:

Mendelian inheritance, the central tenet of genetics, is under attack from a few scrawny weeds that have not read the textbooks. The weeds are somehow inheriting DNA sequences from their grandparents that neither of their parents possessed – which is supposed to be impossible."

I’m not sure how or if it ties in with Alex Hirtz’s theory on the rapid evolution of orchids, but it strikes me that there could be some connection.