Archive of Vanished Flora
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Treefall Light Radicava bialowiensis
Specimen · N°031 · Forest · ▶ Film

Radicava bialowiensis

Somewhere in the forest, it is always in flower.

FOUND 52.7°N 23.8°E · Bialowieza primeval forest, Poland  ·  ✝ EX · Last seen 1975

The Treefall Light is a forest-floor plant some 15 cm tall. It spreads deep-green, faintly translucent leaves low to the ground, and on slender red-brown stems bears pale ivory, nodding, bell-shaped flowers. It roots in the dark damp earth turned up by a fallen giant, joined by fungal threads to the torn old roots, and forms colonies only during the decades while the pit fills with litter and soil — quietly vanishing from that place as the ground levels again. Somewhere in the forest it is always in flower, yet in any one place it is found for a single generation only.

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Portrait

Vertical, as filmed / tap to play
FULL FILM · also on social

“Lamp after the treefall”

This footage was made vertical (9:16) and is also published on social media. The archive keeps it in its original ratio.

9:16 VERTICALFULL EDITSOUND ON
Narration
0:00 / --:--
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Specimen Plates

8 plates · hover to enlarge
Treefall Light plate 1PLATE I
Treefall Light plate 2PLATE II
Treefall Light plate 3PLATE III
Treefall Light plate 4PLATE IV
Treefall Light plate 5PLATE V
Treefall Light plate 6PLATE VI
Treefall Light plate 7PLATE VII
Treefall Light plate 8PLATE VIII
ARCHIVAL PRINTThis specimen is available as a printable plate: Illustrated edition — Etsy ↗ · Photographic edition — Etsy ↗
03

Field Note

Habitat
Bialowieza primeval forest, Poland. It appears only on the damp, dark bare soil of root-pits dug where winter gales have thrown great trees, roots and all.
Local name
Lamp after the treefall
Folklore
Locally, where the Treefall Light blooms it is known that a great tree has lately fallen, and it has been told of as the sign of a forest turning over its generations.
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Locator

Coordinates
52.7°N 23.8°E
Bialowieza primeval forest, Poland
05

Record

Somewhere in the forest, it is always in flower.

Yet in any one place, it is found only once.

Bialowieza primeval forest, Poland

When winter gales throw a giant tree, roots and all, a deep pit is dug into the ground.

The Treefall Light appears only in that dark, damp bare soil.

It nods its pale ivory flowers, growing joined by fungal threads to the torn old roots.

MoreFull specimen data — classification, scientific name, etymology
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Classification

Classification & specimen data
Scientific name
Radicava bialowiensis  A. Reinholt, 1968
Taxonomy
Plantae › Angiosperms › Dicotyledons › RadicavalesRadicavaceaeRadicava › bialowiensis
Voucher
AVF-031 · Holotype
Archive of Vanished Flora (AVF)
Conservation
✝ EX — Extinct Last seen 1975
Collector
N. Drei
1965-08-02
Synonym
Radicavopsis bialowiensis L. Fontaine, 1963
Protologue (Latin)
Herba perennis, rhizomate tenui, foliis linearibus, inflorescentia pauciflora. Typus: Bialowieza primeval forest, Poland. Species iam extincta.
Discovered / Described
1965 / 1968
Height
15cm
Life form
Perennial herb
Phyllotaxy
Alternate
Chromosome
2n = 28
Flowering
A brief flowering (a few days)
Pollination
Wind-pollinated
Substrate · pH
Gravelly, near-neutral
Elevation
200〜1,200 m
07

Etymology

Etymology of the name
RadicavaGENUS
The etymology is not recorded.
bialowiensisEPITHET
The etymology is not recorded.

Addenda

later field notes
2026-06-24 · Cold, Wet Bare Soil

The floor of an uproot hollow thaws nearly half a day later than the surrounding forest floor. Heavy loam derived from glacial deposits drains poorly, and when a fallen tree strips away the leaf litter, only dark, cold mineral soil remains exposed. Seedlings of Radicava bialowiensis appear only in this wet, litter-free substrate; on the upper slopes, where humus soon returns, even traces of germination are rarely found.

2026-06-24 · A One-Generation Colony

The flowers hang so low that visits are infrequent, yet the anthers and stigma stand close together, suggesting a high degree of self-compatibility. After fruiting, the capsules split lengthwise as they dry and spill grey, dust-like seed. Turbulent air after windthrow, and small rills formed by heavy rain, likely carry these seeds into newly opened uproot hollows. The colony moves on; in the old hollow it is buried by leaf litter and fine roots.

2026-06-24 · A Keeper’s Mark

In villages near the border, forest keepers and honey gatherers are said to have remembered this flower as a sign of a windfall only a few years old. A hollow bearing Radicava is still soft enough to take a boot print, and mycelium remains in the split wood of the decaying root. They did not gather the flowers, but used them to recall paths and hive trees. By the time the flowers vanish, the fallen tree has become part of the ground itself.

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Related

Specimens of the same habitat
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