Wow, this is a really big deal.

The state’s largest doctor group is calling for legalization of marijuana, even as it pronounces cannabis to be of questionable medical value.

Trustees of the California Medical Assn., which represents more than 35,000 physicians statewide, adopted the position at their annual meeting in Anaheim late Friday. It is the first major medical association in the nation to urge legalization of the drug, according to a group spokeswoman, who said the larger membership was notified Saturday.

Dr. Donald Lyman, the Sacramento physician who wrote the group’s new policy, attributed the shift to growing frustration over California’s medical marijuana law, which permits cannabis use with a doctor’s recommendation. That, he said, has created an untenable situation for physicians: deciding whether to give patients a substance that is illegal under federal law.