Summary:
Features include 1) resupinate growth on decayed wood, 2) a spore-bearing layer that is thin, loose, easily separable, the color whitish with a yellowish or bluish green tint, the subiculum inconspicuous or virtually lacking, 3) spores that are small, narrowly elliptic to cylindric, smooth, and inamyloid, 4) small basidia, 5) a monomitic hyphal system, with narrow hyphae.

Microscopic:
SPORES 3-4 x 1.5-2 microns, narrowly elliptic or subcylindric, smooth, inamyloid, not or only weakly cyanophilic, thin-walled; BASIDIA 8-12 x 3-4 microns, subclavate, with basal clamp connection, normally 4-spored; CYSTIDIA none; HYPHAE monomitic, 2-3 microns wide, thin-walled in subhymenium, with thin or slightly thickened walls in subiculum, the subiculum with "a loose, cobwebby texture of mostly straight, sparsely branched hyphae", clamp connections at all septa, branching from or close to septa, (Eriksson), SPORES 4-4.5 x 2 microns, cylindric to oblong, smooth, inamyloid, colorless, with a small apiculus; BASIDIA 9-12 x 3.5-4 microns, in candelabrums, cylindric to clavate, mostly 4-spored but a few 2-spored, with basal clamp connection; CYSTIDIA none; HYPHAE monomitic, 2-4 microns, colorless, thin-walled, with clamp connections, with frequent branching, often branching from a clamp connection, (Gilbertson)

Notes:
Leptosporomyces galzinii has been found in BC, WA, ID, AB, MB, NT, ON, PQ, AZ, CA, CO, CT, LA, MD, ME, MT, NH, NJ, NM, and NY, (Ginns), as well as Austria, Czechoslovakia, France, Poland, Sweden, Turkey, and the USSR, (Julich).