MEMORANDUM  BBC/INT/034-0825

Date: 18 August 2025   |   Issued By: Field Operations Desk   |   Distribution: Internal – Level IV and above

Subject: Marais Vegetal Compliance Survey — Summary Findings

Observational Notes

• Concentrated emergence of Taraxacum officinale (dandelion), Conyza canadensis (horseweed), and Atriplex patula (common orache) observed along the low wall separating Quai de l’Hôtel de Ville and Voie Georges Pompidou; colonisation limited in scale but recurrent at fissure points.
• Mature Platanus × hispanica specimens restricted to Quai de l’Hôtel de Ville exhibited characteristic bark exfoliation, producing accumulations in circulation and drainage corridors.
• Seasonal leaf dispersal noted in façade recesses adjacent to the Quai, surface litter remaining primarily symbolic rather than obstructive.
• Vegetative units within the perimeter of the Cité internationale des arts displayed minimal adaptive behaviour during citation procedure.

Advisories for Botanical Adjustment

1. Recommend restraint of pavement crack colonisation by dandelion, horseweed, and orache units along the low wall corridor between Quai de l’Hôtel de Ville and Voie Georges Pompidou.
2. Advise Platanus × hispanica specimens on the Quai to moderate bark detachment within circulation and drainage zones. Encourage fallen leaves to consolidate at peripheries to avoid obstruction of façades and water channels.
3. Remind all generative units within Zone 2B that spontaneous propagation without registry reference remains discouraged under Mandate 001.

BBC/INT/034-0825 (PDF; EN/FR)