The Santa Cruz Mycoflora Project

A Comprehensive Reference to the Macrofungi of Santa Cruz County

Genus: Xerocomus

Family: Boletaceae

Xerocomus subtomentosus

Xerocomus subtomentosus

Xerocomus subtomentosus

Known Species in the County

Species Formerly Included in Xerocomus

Approximately 1 species in Santa Cruz County.

Xerocomus Records from Santa Cruz County:

Xerocomus boletes have dry, felty or velvety caps, yellow pores that bruise blue (sometimes slow or absent), and variably smooth or very coarsely reticulate stipes. Those in our area show yellow basal mycelium.

All appear to be mycorrhizal.

There seem to be relatively few species in California, but their taxonomy remains vexed due to unclear proper names (we are currently using borrowed European names) and variable morphology.

Important identification characters are stature, overall coloration, and fleeting macrochemical reactions to ammonia (the latter of unclear and even suspect utility).