The Third District Court of Appeal appeared receptive during oral arguments Monday to a Miami pioneer family’s effort to overturn a popular referendum on the future of Crandon Park in Key Biscayne.

Bruce Matheson, a descendant of the family that ceded the land for the 808-acre oceanfront park over 70 years ago, appealed the January dismissal of his lawsuit by Miami-Dade Circuit Judge Marc Schumacher. A November 2012 county referendum to upgrade the park’s tennis center was approved by a 72 percent vote.