Hydnum umbilicatum Pk. Cap 3-5cm across, slightly irregular in shape (less so than in Hydnum repandum), soon deeply umbilicate, often with the depression continuing into the stem; deep reddish buff to orange-brown; smooth to slightly felty. Spines on undersurface up to 7mm long; pale buff. Stem 25-80 x 5-l0mm, usually central; slightly paler than the cap, bruising darker. Flesh thin; whitish buff. Odor none. Taste mild. Spores subglobose, tuberculate, smooth, 7.5-9 x 6-7.5µ. Deposit white. Habitat usually in some numbers, in wet boggy woods under spruce, balsam, or cedar, occasionally deciduous woods. Common. Found in eastern North America and the Great Lakes area. Season September-October. Edible - good.