Archive of Vanished Flora
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Ice-clad Flower Crystallanthus altaicus
Specimen · N°012 · Ice · ▶ Film

Crystallanthus altaicus

At dawn, the flower is sealed in glass-like ice.

FOUND 49.5°N 87.5°E · Highland steppe of the Altai Mountains, Siberia  ·  ✝ EX · Last seen 1989

A small perennial about 7–12 cm tall, its slender dark-green leaves clad in frost. Each plant bears a single violet-blue bell-shaped flower; the night's cold wraps the whole bloom in a thin clear shell of ice, which melts within hours in the morning sun.

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Portrait

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

「Bell of Ice」

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
Ice-clad Flower plate 1PLATE I
Ice-clad Flower plate 2PLATE II
Ice-clad Flower plate 3PLATE III
Ice-clad Flower plate 4PLATE IV
Ice-clad Flower plate 5PLATE V
Ice-clad Flower plate 6PLATE VI
Ice-clad Flower plate 7PLATE VII
Ice-clad Flower plate 8PLATE VIII
ARCHIVAL PRINTThis specimen is available as a printable plate: Illustrated edition — Etsy ↗ · Photographic edition — Etsy ↗
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Field Note

Habitat
Highland steppe of the Altai Mountains, Siberia. It is found only on frozen gravel at dawns of strong late-autumn radiative cooling.
Local name
Bell of Ice
Folklore
Locally, the thicker the ice shell in the morning, the earlier winter was said to arrive.
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Locator

Coordinates
49.5°N 87.5°E
Highland steppe of the Altai Mountains, Siberia
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Record

At dawn, the flower is sealed in glass-like ice.

It melts only in the few hours after the morning sun.

The highland steppe of the Altai, Siberia.

At a dawn frozen by radiative cooling, the Ice-clad Flower appears.

Its slender dark-green leaves are wholly clad in frost.

At their centre, a single violet-blue bell-shaped flower has opened.

MoreFull specimen data — classification, scientific name, etymology
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Classification

Classification & specimen data
Scientific name
Crystallanthus altaicus  M. Castellan, 1982
Taxonomy
Plantae › Angiosperms › Dicotyledons › CrystallanthalesCrystallanthaceaeCrystallanthus › altaicus
Voucher
AVF-012 · Holotype
Archive of Vanished Flora (AVF)
Conservation
✝ EX — Extinct Last seen 1989
Collector
E. Mori
1982-01-04
Synonym
Crystallopsis altaicus K. Brandt, 1980
Protologue (Latin)
Herba parva rosulata, foliis crassis glaberrimis, floribus parvis stellatis. Typus: Highland steppe of the Altai Mountains, Siberia. Species iam extincta.
Discovered / Described
1982 / 1982
Height
7〜12cm
Life form
Perennial herb
Phyllotaxy
Alternate
Chromosome
2n = 14
Flowering
A few hours around dawn
Pollination
Nocturnal small moths
Substrate · pH
Fine gravel on ice / cryoconite
Elevation
200〜1,200 m
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Etymology

Etymology of the name
CrystallanthusGENUS
crystallcrystal
anthflower
altaicusEPITHET
The etymology is not recorded.

Addenda

later field notes
2026-06-24 · Pollination at Daybreak

When a bell-shaped flower was opened inside its ice sheath, the anthers were bent close against the pistil, and the damp pollen had fallen directly onto the stigma. This is not a flower built to wait for insects in the late-autumn steppe. Its buds appear to be formed the previous summer, opening briefly only after freezing nights and completing self-pollination before thaw. The ice is not ornament, but a small greenhouse against the wind.

2026-06-24 · Seeds Between Stones

Fruiting plants are inconspicuous, leaving a narrow capsule at the base of brown sepals after the ice has gone. The seeds are light but have no plume, suited less for flight than for falling into gravel gaps. Frost heave lifts them a few centimeters through winter, and spring meltwater carries them beneath dark stones. Even where the plant appears in colonies, the pattern seems not clonal spread, but seedlings established along the same freezing line.

2026-06-24 · The Morning That Leaves No Specimen

Its sites are biased toward slopes rich in black gravel derived from basaltic or metamorphic rock. Stones warmed by day cool rapidly at night, dropping only the air around the corolla to the frost point, while the coarse drainage prevents root rot. The ice sheath disappears within hours of sunrise, and the remaining plant is easily filed among small gentian or bellflower-like herbs. With flowering years irregular, an afternoon collector would have pressed only an unremarkable alpine herb.

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Related

Specimens of the same habitat
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