From careful reading of the disclaimer at the bottom of the article, it seems to me that it was a hoax.

igor Michael Motyka wrote:

I didn't think of this before but add together bees, wind and rampant tree sex and this stuff will definitely spread. It could even become a bit of a "problem".

The people who have packets of seeds should distribute those quickly to friends before the buggerers get the mailing list and start confiscating seeds.

BTW - I believe that citrus hybridize freely, rather like mentha in that respect.

Wild and cool. I think he should do apples next. Then strawberries. Peaches. Beans. A whole fucking farmer's market.

- Igor.