Missouri Department of Conservation
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Hen of the Woods (Maitake)

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Grifola frondosa
Family: 
Meripilaceae
Description: 

Large circular cluster of spoon-shaped caps; grayish brown on top and white beneath; single, branching, whitish base. Grows on the ground at the base of oak trees. September–November. Each cap spoon- or fan-shaped; grayish to gray-brown to brownish. Pores angular; white to yellowish. Stalk short; branching; white. Spore print white. Spores magnified are elliptical, smooth.

Lookalikes: Black-staining polypore (Meripilus sumstinei) blackens when bruised or handled. Berkeley’s polypore (Bondarzewia berkeleyi) is thick-fleshed and cream-colored. Eastern cauliflower mushroom (Sparassis spatulata) has ribbonlike folds. Remember that hen of the woods is a pore fungus (polypore) and lacks gills.

Size: 
Cluster width: to 3 feet (weight: to 100 pounds); cap width: ¾–3 inches.
Habitat and conservation: 
Grows as a single large circular cluster on the ground at the base of oak trees or stumps. Common in hardwood forests with mature and aging trees, particularly in moist woodlands and in river bottoms, where there are plenty of mature and aging trees. It is often found in the same area year after year, so check your spot every autumn.
Distribution in Missouri: 
Statewide.
Status: 
A choice edible, and also considered a medicinal mushroom. This not only is this a deliciously choice mushroom, but also is known to have many health benefits, including support for the immune system and improvements in blood pressure, blood sugar, and cholesterol levels. Hen of the woods also makes a hearty and meaty mushroom soup. Use only fresh, tender portions. Simmer slowly in salted water until tender.
Life cycle: 
This species lives as a network of cells (mycelium) within dead trees as a saprobe, and living trees as a parasite, digesting and decomposing the wood. When ready to reproduce, the mycelium develops the “henlike” reproductive structure that emerges from near the base of the tree. Spores are produced in pores on the undersides of the caps and are released to begin new mycelia elsewhere.
Human connections: 
Enjoyed both as food and for the fun of hunting. In Asia, this species, called maitake or "dancing mushroom," is considered medicinal. It is often available in international groceries. Researchers are exploring its medicinal potential.
Ecosystem connections: 
Fungi are vitally important for a healthy ecosystem. This fungus feeds off of dead or dying trees, decomposing them as they go. This cleans the forest and helps nutrients to cycle back into the soil—an unglamorous but vital role in the ecosystem.

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