Q: I want to go morel hunting this spring. What are the regulations regarding collecting them from public land?
A: Most public lands allow mushroom collecting for personal consumption (noncommercial purposes) and no permit is required. Collecting is allowed on conservation areas except on the grounds of several conservation nature centers and our headquarter office grounds in Jefferson City. Missouri’s state parks allow collecting and specify a limit of two gallons per person per visit. Mark Twain National Forest allows collecting with no quantity specified.
(source: MDC Conservationist, April 2011 - Volume 72, Issue 4, http://mdc.mo.gov/conmag/2011/04/miscellany [accessed 4-4-11])
The only thing I would add to this is if you are looking at a city park be sure to check for specific regulations. Most cities do not have any regulations or their regulations mirror the state's in that you can pick for personal consumption. However, a few do have specific restrictions. I will never forget the day I had just spent an hour picking trumpets and chanterelles in a St. Louis Park only to have a police officer come over and order me to dump my basket because St Louis County has an ordinance that does not allow mushing picking in their parks. It was hard enough with chants, it would be an even harder lesson to learn after having to give up a nice mess of morels.