Summary:
Also listed in Jelly category. Features include 1) the shape that is top-shaped becoming cup-shaped to disc-shaped, 2) dark purple to black spore-bearing upper surface, 3) gelatinous texture at least when young, 4) exterior that is gray and matted-hairy, and 5) microscopic characters including large spores without droplets. Although this species was described as Sarcosoma latahensis (using a feminine form for the adjective), "soma" is a neuter Greek noun and should use the neuter form of the adjective, "latahense";

Microscopic:
spores 24-38 x 9-12 microns, elliptic, with blunt to rounded ends, smooth, colorless, containing a few small oil drops when young but none at maturity; asci 8-spored, 380-470 x 10-14 microns, cylindric, narrowing basally, the bases sometimes forked, asci suboperculate; paraphyses 3.2-5.2 microns broad at tip, 2.8-3.5 microns broad in lower part, filiform [thread-like] to slightly clavate, "branched, anastomosing, closely septate", "often bent or irregularly lobed, containing a homogeneous, olive-brown pigment, embedded in an amorphous brownish material"; hypothecium of textura intricata, the hyphae 2.8-5.2 microns wide, medullary excipulum of textura intricata, the hyphae 5-10 microns wide, colorless, ectal excipulum of textura angularis, the inner cells colorless, the outer cells with dark brown walls, usually isodiametric and up to 20 microns wide, at times up to 50 x 35 microns and oriented with long axes perpendicular to the exterior; hyphae of tomentum up to 400 microns long, 4-8.5 microns wide, slightly tapered, colorless to olive brown, (if pigmented paler in distal end), branched, septate, smooth except for occasional dark granules near basal end, at times with globoid swellings, (Paden), paraphyses with irregular apices, sometimes curved, slender, much branched, (Castellano), spores 24-37 x 9-12 microns (Trudell)

Notes:
Pseudosarcosoma latahense is found at least in WA, OR, and ID, (Larsen), and BC (Carbone). A collection from BC determined by B. Callan was deposited at the Pacific Forestry Centre.

Synonyms and Alternate Names:
Aleuria rhenana Fuckel
Polyporus niveus Jungh.
Tyromyces semipileatus (Peck) Murrill