Summary:
Features include 1) a nearly spherical to kidney-shaped, dark reddish brown fruitbody that becomes blackish brown where bruised, the surface tomentulose, with plentiful fibrils at a definite point of attachment, 2) a spore mass that is slaty black, slightly lined or streaked with septa and the cavities filled with gel, and 3) microscopic characters including dark, smooth, suboval spores in a gel. It is infrequent in the Pacific Northwest (Trappe(13)).

Interior:
slaty black, "slightly lined or streaked with thin septa", cavities filled with spores in a gel, (Zeller), white to pale yellow, then gray-black, with numerous +/- rounded cavities, (Buczacki)

Odor:
strong, offensive (Zeller), strong, unpleasant, foetid, (Buczacki)

Taste:
indistinct (Buczacki)

Microscopic:
spores 11-13 x 7.4-8 microns, dark, mostly suboval, "obtuse, smooth, very rarely somewhat fusiform, tip subacute"; cavities filled with spores in a gel; "thin septa, of hyaline (dilute yellowish) gelified hyphae"; peridium 125-160 microns thick, "light yellow to brownish near the exterior", stupose [with tufted or matted filaments], "of hyphae with vesiculose cells, homogeneous, but loosely woven at the surface with some erect hyphae giving the tomentulose character, distinct from the tramal tissue", (Zeller), spores 10-14.5 x 6.5-9 microns, broadly elliptic to short terminal appendage, smooth, brown-black, (Buczacki)

Notes:
Melanogaster intermedius has been found in western OR and northern CA (Trappe(13)). It has also been found in England (Zeller). There is a BC collection at the University of British Columbia.

Synonyms and Alternate Names:
Onnia leporina (Fr.) H. Jahn Westfalische