Cap 40-150 mm broad, broadly campanulate becoming plano-convex with a broad umbo, dry, covered with brown to yellowish brown squamules and small, yellow, scalelike universal Viel remnants, margin with white partial Viel remnants, light brown to yellowish brown or orangish brown. Gills subdecurrent, close, broad, grayish orange to grayish brown. Stem 50-90 x 10-25 mm, cylindrical to clavate, fibrous, white above, brown below, covered with white to yellow Viel remnants; with a membranous, white to yellow, persistent annulus; with coarse, cylindrical, black rhizomorphs. SporeDeposit white. Edibility: edible.
This large Armillaria grows singly or in pairs out of soil or from rotten logs under karakanut, a native tree of New Zealand seeded in the Koke‘e area in the late 1800s. Armillaria sinapina is characterized by the yellow veil remnants on the cap and stem surfaces and noncespitose habit. Armillaria species are of interest to foresters and mycologists because many are pathogenic to some trees. They are at the same time edible and known to mycophagists as the Honey Mushroom (because of their color, not their flavor). Is: KA.