Summary:
Features include a nearly spherical, dirty white fruitbody with a peridium that tends to disappear, a spore mass that is firm and finally friable, colored ochraceous buff, the cavities polyhedral and filled with spores, a sterile base present but columella not seen, and microscopic characters including round spores 7-8 microns in diameter with very large verrucae, 9-10 per great circle. It is rare in the Pacific Northwest (Trappe(13)).
Sclerogaster pacificus has been found in southern BC and coastal OR, (Trappe(13)). The holotype is from OR (Zeller).
Outer Surface:
0.8-1cm across (dried), nearly spherical; dirty white; peridium evanescent [disappearing], (Dodge)
Stem:
sterile base present; columella not seen, (Dodge)
Interior:
firm, finally friable; ochraceous buff; "cavities polyhedral, filled with spores", (Dodge)
Microscopic:
spores 7-8 microns, round, with very large verrucae, 9-10 per great circle; basidia clavate, soon collapsing and evanescent; "septa of loosely woven, slender hyphae in a gel, thin, 20-30 microns thick"; peridium about 100 microns thick, pseudoparenchymatous, cells up to 200 x 30 microns, very thin-walled, (Dodge)
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