E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include lobed, dingy white fruitbodies averaging 1.5cm across, the surface slightly scabrous, and microscopic characters including round-elliptic spores measuring 32-40 x 28-34 microns that are very minutely alveolate [pitted] with 12-16 x 11-14 alveoli across the diameter, asci that are 2-4-spored and nearly spherical, and a peridium 280-640 microns thick. The description is derived from Gilkey(3) except where noted. It is common in the Pacific Northwest, (Trappe(13)).

Tuber monticola has been found from BC to northern CA and ID (Trappe(13)). It was described from CA. It was reported from OR by J. Smith et al., and from WA by Colgan(2).

Outer Surface:
averaging 1.5cm across, lobed; dingy white; surface slightly scabrous

Microscopic:
spores 32-40 x 28-34 microns, round-elliptic, very minutely alveolate [reticulate-pitted] with 12-16 x 11-14 alveoli across diameter; asci 2-4-spored, nearly spherical; peridium 280-640 microns thick, "cortex minutely pseudoparenchymatous, the cells varying little in size, the walls not thickened, the pseudoparenchyma changing gradually to very loose, branched hyphae"