Puffballs Horticulture and Home Pest News
Many Iowans have recently noticed large, white fungal spheres emerging from the ground in lawns, prairies, and forests. These puffballs are the fruiting structure of a fungus, and come in a variety of sizes. Perhaps the most common species of puffball is the giant puffball, Langermannia giganteum (formerly Calvatia gigantea). This puffball can grow up to a foot or more in diameter, appearing as a large, white ball. At first it has the texture of a marshmallow, but as the puffball matures it turns olive-brown, and the interior becomes spongy and filled with spores.
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