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Blechnum magellanicum, Costilla de vaca (Chilean Spanish for cow's rib) or palmilla is a medium-sized fern native with a natural range from Talca at 35° S, to Magallanes Region in Chile.
It is part of Magallanes Region and Province, and is administered by the municipality of Punta Delgada, the principal town in the commune (the coordinates are those of Punta Delgada).