Details about map content are available here Click on the map dots to view record details.
Species Information
Summary: Features include 1) resupinate growth on wood, 2) a waxy, soft fruitbody that is whitish and smooth, the margin filamentous or not differentiated, 3) spores that are elliptic to suballantoid, smooth, inamyloid, cyanophilic, and colorless, 4) basidia that are 2-6-spored, and obconic to tubular, sometimes constricted, and 5) a monomitic hyphal system, the hyphae richly branched, with clamp connections.
Sistotremastrum niveocremeum has been found in BC, ON, PQ, AZ, FL, IA, MA, MD, MO, NY, PA, RI, VA, and WI, (Ginns), as well as Denmark, Finland, Norway, and Sweden, (Eriksson), and Switzerland and Asia, (Breitenbach).
Fruiting body: resupinate, adnate [firmly attached], mostly thin (about 0.01cm), ceraceous [waxy] and continuous when fresh, "when dried mostly porulose due to shrinking"; white or when dried yellowish; margin not differentiated; no rhizomorphs, (Eriksson), resupinate, attached loosely, "forming filmy, farinose patches" several centimeters across, "consistency soft, easy to wipe off"; white to gray-whitish; "smooth, finely farinose, somewhat fissured in thicker places"; "margin thinning out and filamentous", (Breitenbach), spore deposit white (Buczacki)
Microscopic: SPORES 6-9 x 2.5-3(4) microns, narrowly elliptic-subcylindric-suballantoid, smooth, thin-walled; BASIDIA 4-6-spored, 15-26 x 4-6(7) microns, obconic to tubular, sometimes somewhat constricted, with basal clamp connection; CYSTIDIA none; HYPHAE monomitic, 2-3 microns wide, colorless, with clamp connections, richly branched, "few straight basal hyphae", (Eriksson), SPORES 7-8.5 x 3-4 microns, elliptic to cylindric, smooth, inamyloid, cyanophilic, colorless, some with droplets; BASIDIA 2-4(6)-spored, 20-27 x 5-7.5 microns, clavate, with basal clamp connection; CYSTIDIA not seen; HYPHAE monomitic, 1.5-3 microns wide, with clamp connections, "sometimes rather inflated at the septa", (Breitenbach)
Habitat / Range
on decayed wood of hardwoods (e.g. Quercus, Corylus, Alnus) and sometimes on Picea (spruce), (Eriksson), "on the underside of dead, barkless hardwood"; fall to winter, (Breitenbach), on Abies (fir), Acer (maple), Alnus (alder), Betula (birch), Populus, Quercus (oak), Sassafras, (Ginns), all year (Buczacki)
Similar Species
Sistotremastrum suecicum has thicker fruitbodies, narrowly elliptic spores 4.5-6 microns long, and typically grows on conifer wood, (Eriksson).
