TheConservatory
Catalog
Pressed specimen of Lamplighter's Moss (Bryum vesperale)
The Conservatory · HerbariumBryum vesperale
No.
H-0231
Fam.
Bryaceae
Loc.
Signal box, disused Ostrava line
Leg.
J. Šimek, railway clerk, 1962

H-0231HerbariumBryaceae

Lamplighter's Moss

Bryum vesperale

Archived

A cushion moss that photosynthesises from attention rather than light, and dies in rooms nobody visits.

Collected at
Signal box, disused Ostrava line
Date
1962
Collector
J. Šimek, railway clerk
Anomalies
Emotional response

Sequenced fragment

TTAGCCGATCGATTGGCATTAGCCGATTACGTTAGCATGCATTAGCGGCATTAGCATCG

59 bpGC 47%Chlorophyll genes intact but silenced. Photosystem II replaced by an unknown protein complex.

Description

A cushion moss forming dense, rounded tufts 2–4 cm tall and about 5 cm across, made of crowded upright stems with fine, lance-shaped leaves. Slender reddish stalks rise above the cushion, each ending in a small, drooping capsule.

Observations

The cushions stay bright green and thrive in complete darkness, provided they are looked at. Specimens kept in a locked cupboard for a month turned brown; the one kept on the clerk’s desk is still green after sixty years in a drawer — a drawer the clerk’s grandson opens every Sunday.

Genetic analysis

The chlorophyll pathway is present but switched off. Its role appears to be filled by a protein complex with no known homologue, active only when a person is within about four metres and facing the plant.

Cultivation

Not recommended. The moss competes for attention and becomes noticeably more vivid when other plants in the room are admired.

Effects

Observers report a mild compulsion to check on it.