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Growing in residential yard with grass. Pecan tree and Eastern Red Cedars in vicinity. No reaction on cap or stipe with KOH. No partial veil in young specimens. Base of stipe bulbous. Stipe shaggy. No discernable odor.

From a description of Zelleromyces in the southeastern United States in Mycotaxon 72, Steven Miller and Teresa Lebel describe Z. cinnabarinus as the most often found species in the genus. However, Z. cinnabarinus spores are about 13–17.5 × 11.5–15.5 μm, whereas this specimen's spores are 8–9.5 × 6.7–8.5 μm; almost a 2x discrepancy. This is mostly similar to another species described by Miller and Lebel, Z. versicaulis, with spores described as 8–9 × 6.5–8 μm. While Z. cinnabarinus grows exclusively under Pinus, Z. versicaulis may grow under Quercus, especially Q. virginiana. This specimen was growing a few feet away from the base of Q. virginiana.
Spores are hyaline in KOH, with ridges/ornamentation amyloid in Melzer's.

Images
All scale bars 10 μm.
1: Cross section showing latex
2: Spores – Melzer's
3-8: Habit
9: Basidium – MLZ
10: Peridium – MLZ
11-17: Basidia/hymenial elements – KOH
18-20: Hyphae – KOH