The Siren Bellflower produces a rising pressure tone before releasing a cloud of electrically charged red spores from its hanging blooms.
Flowers
Each crimson flower hangs downward from a curved stem. A pale ringed membrane fills the throat, and hundreds of fine black vibration hairs line the lower edge of the bell.
Broad blue-green leaves channel charged rain toward a round underground bulb. Stored pressure keeps the flowers closed during calm weather and powers their release cycle during a storm.
Warning tone
Before releasing spores, the throat membrane tightens and produces a low note that rises steadily for about twelve seconds. Nearby bells may answer at a different pitch, creating a clear warning across the drainage channel.
The tone itself is not a voice or an alarm signal. It is caused by pressure passing through the membrane, much like air moving across the opening of a bottle.
Reproduction
At the highest note, the bell opens fully and releases small red spores carrying a strong static charge. The spores drift toward metal railings, antennas, wet clothing, and active screens before losing their charge.
Field safety
Residents remain eight meters away whenever a bell is open or sounding. Field staff ground nearby equipment, wear hearing protection, and wait until every flower has closed before collecting fallen spores from the marked area.