Ringless Honey Mushroom

Armillaria tabescens (Armillariella tabescens)

Honey-colored, with a dry, scaly cap, lacking a ring on the stalk. Grows in clusters on wood. September–November. Cap convex, then flattened, the margin uplifted with age; yellow-brown to honey brown, with reddish brown cottony scales; texture dry, scaly. Gills narrow to broad; spacing distant; whitish, staining pinkish to brownish; attachment slightly descending. Stalk thick, tapering toward base; off-white to brownish; texture fibrous; growing in clusters with stalks fused at bases. Spore print white. Spores magnified are elliptical, smooth, colorless.

Lookalikes: The honey mushroom (Armillaria mellea) has a sticky cap and a ring. The poisonous jack-o'-lantern (Omphalotus illudens) is orange with a smooth cap. The big laughing gym (Gymnopilus junonius) is orange, bitter, with orange-brown spores and a ring. The deadly galerina (Galerina marginata) is smaller, has a smooth cap, a stalk ring, and brown spores.

Cap width: 1–4 inches; stalk length: 2–8 inches; stalk width: ¼–½ inch.
Habitat and conservation: 
Grows in clusters, often in large numbers, at the bases of trees or stumps, especially oaks. Common in urban yards. Sometimes it looks like it's growing right out of the ground, but it is actually growing from low stumps, roots, or other buried wood.
Distribution in Missouri: 
Edibility good when young and fresh. Although a good edible, ringless honeys must be thoroughly cooked, or they can cause serious stomach upset. Try a small amount at first, and make sure it is fully cooked. If gathering from urban areas, make sure no lawn treatments have been used! Some people use only the caps, discarding the tough stems. As always, be certain of your identification before eating any wild mushroom.
Life cycle: 
Armillarias exist most of the time as a network of cells (mycelium) penetrating the tissues of living trees, frequently killing their hosts by damaging the tree’s ability to transport water and nutrients. This particular species may be an exception, however, living on dead, not living, wood. When ready to reproduce, the mycelium forms mushrooms, which produce spores that are released to begin new mycelia elsewhere. The mycelia of armillarias find new hosts by spreading through the soil.
Human connections: 
Most of the mushrooms in the Armillaria geunus are parasitic on trees and can kill them, especially young or weakened ones. It can be a problem in orchards. Because the mycelium spreads beneath the soil surface, it can be difficult to control.
Ecosystem connections: 
Most honey mushrooms are parasites on living trees. The ringless honey is in the same genus as the “humongous fungus,” an Armillaria mycelium that is over 2.5 square miles in size! One specimen is estimated to be more than 450 years old.
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