Calopogon tuberosus, the tuberous grasspink, is an orchid native to eastern North America. In the United States it occurs from as far southwest as Texas and Oklahoma and southeast to the Florida Everglades to as far northeast as Maine and as far northwest as Minnesota. In Canada it is found all provinces from Newfoundland to Manitoba. It also is found in St. Pierre & Miquelon, Cuba and the Bahamas.