Mama Ravin, whose real name is Regina Lawson, has been hosting her “Herbal Walk & Talk” in partnership with the Detroit Riverfront Conservancy for the past decade. The “chat and chew” stroll takes participants through Milliken State Park, stopping to identify edible herbs and learn their culinary and medicinal properties along the way. We recently attended a tour, as well as a medicinal herbs class in Hamtramck taught by Zarah Ackerwoman. This is what we saw.