Ecology: Growing on the underside of twigs and leaves of a fallen Atlantic white cedar (Chamaecyparis thyoides) laying on the ground.
Basidioma: White, effused, smooth (even), thin, fragile, and athelioid (pellicular) with an indeterminate arachnoid margin.
Chemical reactions: NA
Spore print: NA
Hyphal system: Monomitic and clamped with blocky, stellate encrustations; subicular hyphae ampullate, often aggregating together into cordons, width (2.4) 2.5–3.1 (3.3) µm (n = 10); subhymenial hyphae slightly larger and less frequently ampullate, width (2.6) 3.0–4.2 (4.5) µm (n = 10).
Basidia: Cylindrical to clavate or sometimes with a median constriction, with four sterigmata; length (8.4) 8.7–9.8 (10.1) µm, width (3.9) 4.0–4.6 (4.8) µm, x̄ = 9.3 ✕ 4.3 µm (n = 10).
Basidiospores: Small, ellipsoid, ornamented (verrucose), inamyloid; length (3.5) 3.5–4.1 (4.5) µm, width (2.3) 2.4–2.7 (2.9) µm, x̄ = 3.8 ✕ 2.6 µm; Q (1.2) 1.4–1.6 (1.7), x̄ = 1.5 (n = 30).
Sterile structures: Absent.
Sequences: NA
Notes: All measurements taken in 5% KOH stained with phloxine.
ACD0592, iNat139342707; 18 October 2022; Cape Cod National Seashore, Barnstable Co., MA, USA, 41.9108 -69.9806; leg. Alden C. Dirks, det. Alden C. Dirks, ref. ; University of Michigan Fungarium ——.