what i think he is talkin about.
found some news.
I dont think its real. but maybe it is.
Technology Review: Science Fiction: Osama Phone Home

(3) A brilliant young geneticist on the West Coast was doing groundbreaking work in biopharma*ceuticals, especially in the mechanics of directing what part of the plant would store the finished drug--leaf, root, seed, or fruit.

Moreover, according to our private sources, this same professor was also conducting a little biopharma project outside the purview of his university department. He was attempting to genetically modify the common dandelion to produce the marijuana cannabinoid THC. According to our report, once his stoner dandelion was perfected, the professor intended to take a sabbatical in order to scatter little parachute seeds of Mellow Yellow along roadways all over the temperate zone.

What galvanized us about these three items was the observation that both ragweed and dandelion are members of the same Asteraceae family. It made us wonder. It definitely got the wheels turning.