Mary’s comments with the photograph include details on where this plant was found: “Growing spontaneously in an orchard in western Panama, 800 m elevation.” This plant was the second one she has discovered so far this year. She wrote an extensive weblog post about the first Xanthosoma mexicanum she encountered. In fact, I don’t think I have much to add to what she’s written, so I do suggest following the link for more information. I’ll only pipe in that the distribution of the species is from Mexico to Colombia and Brazil.
For more photographs of the genus, commonly known as elephant’s ears by some, see Xanthosoma on AroidPictures.fr.