STOCKTON — The store clerks, experts in the trade, are known as budtenders.Depending on the product, you can smoke, drink or rub on the merchandise, or apply a medicated transdermal patch, or put a drop in your mouth beneath your tongue.Products have names like Motorbreath, Sherbaccio, Dr. Extreme and Kosher Dawg, the last of which is not believed to have received the blessing of any known rabbi.With little fanfare, commercial recreational [...]