Net-Forming Slime Molds: Recognizing Hemitrichia in the Field

A plasmodiocarp is a fruiting form that follows vein-like tracks instead of forming isolated balls. In repeated community records, net-like yellow patterns are repeatedly linked with Hemitrichia serpula observations.

Field cues for net forms

• Reticulate pattern spread over substrate.
• Connected network rather than separate spheres.
• Pretzel-like or mesh-like visual layout in mature state.

Net form vs clustered sporocarp

Feature	Net-form plasmodiocarp	Clustered sporocarps
Body layout	connected tracks	separate units
Pattern continuity	high	low to medium
Shape memory from plasmodium	strong	weaker

Failure mode in overripe specimens

When overripe, net structures can collapse into powdery or broken fragments. At that stage, original pattern can be lost and ID confidence drops.

Practical workflow

1. Photograph whole pattern before close-ups.
2. Mark growth direction and substrate type.
3. Return next day to capture opening state.
4. Avoid species-level certainty if network collapsed.

Confidence note

Net-form pattern is a strong first-pass cue, but species decisions still need opening behavior and internal structure context.

Related reading: Dehiscence Patterns, Arcyria, Comatricha, and Cribraria, Best Substrates for Slime Molds.