Japanese Pot

Japanese prison officials are surprised by the 300 some odd marijuana plants that keep sprouting up on the grounds of Abashiri Prison. Even more surprising, prisoners know what marijuana plants look like:

The marijuana plants started sprouting at Abashiri Prison on Japan's northernmost island of Hokkaido about a year ago, said prison official Takeshi Okamura. He said officials plucked out as many as 300 marijuana plants and treated the ground last year, but several more sprouted again this year.

Prisoners reported them to the guards.

Officials believe the plants are wild.

"Apparently, somebody knew how to tell marijuana from other plants," Okamura said.

Who knew criminals could tell pot from dandelions?