Physarum · Track 8 · middle

Ode to Arcyria denudata

Bright red-pink plume tufts on decaying logs, like tiny coral fans. The capillitium — the internal spore network — expands dramatically when ripe, unfurling outward from the sporangium into a fluffy mass that catches the slightest air current. Each puff of wind carries spores further. The unfurling is irreversible. An ode to the expansion that was always folded inside — the bloom that releases everything at once and cannot be recalled. | NEUROSCIENCE LENS: Irreversible expansion — the capillitium unfurls and cannot be recalled, analogous to long-term potentiation (LTP) in synaptic strengthening. The synapse that fires together wires together; the sporangium that opens cannot close. Some changes in a system are one-way doors.

Lyrics

Late September. Overcast.
The air is damp lignin and leaf mold.
Fourteen degrees on a mossy oak log.
Waiting for a change that has no clock.

Here you are. Arcyria denudata.
A city of tiny coral fans, still closed.
Red-pink tufts, packed tight like a secret.
I touch one with my fingertip.
Waxy and cool.
A promise held under the skin.
Everything you will become is folded inside,
waiting for a signal that isn't sound.

And then the bloom.
The irreversible bloom.
A sudden, silent expansion.
The synapse fires and cannot un-fire.
The capillitium unfurls, a one-way door.
What was held inside is now free.
And you can never go back.

There's no warning, just a shift.
A faint, dry rustle as the mass catches air.
The internal threads elongate.
Four times their length.
Six times.
A purely mechanical sigh.
It isn't growth, it's just letting go.
It's the structure remembering what it was built for.

And there's the bloom.
The irreversible bloom.
A sudden, silent expansion.
The synapse fires and cannot un-fire.
The capillitium unfurls, a one-way door.
What was held inside is now free.
And we can never go back.

It's like the moment a circuit closes.
A path burned into place in the dark.
Long-term potentiation.
The words we said that summer by the lake.
You can't unsay them.
They're wired in now.
Some changes are not a process.
They are a single, quiet event.
A door that only opens out.

The coral plumes are open now.
Empty.
Rust-colored, catching the slightest wind.
The spores are gone on their journey.
The structure remains, a monument.
To the moment it opened.
The beautiful, permanent wound.