In Santa Margarida i els Monjos, as in other municipalities, there are a number of trees protected and catalogued as Trees of Local Interest, included in the Municipal Urban Development Plan (POUM). At the same time, the Diputació de Barcelona, as part of the cultural heritage maps it draws up with its municipalities, lists some of the town's trees as Singular Botanical Specimens. Only three of the five trees listed in the POUM coincide with the five trees that form part of the Diputació's map: The three pines – which are now only two – , the holm oak of Ca l'Ambornar and the plane trees of Les Masses. Based on this local singularity and in line with other projects by Mariona Moncunill such as Forest, Forest (2012) or Text on Snow on the Botanical Garden (2012), AIL/EBS (acronym for Árboles de Interés Local / Especímenes Botánicos Singulares) explores the idea of nature through its patrimonialisation and the management of its symbolic value.

The video Tinc ametllers, però no s'acaben d'assemblar a una olivera*, is based on two interviews with Josep Maria Calaf, environmental technician of the city council and Josep Anton Pérez Arriaga, from Tríade Serveis Culturals, the company in charge of making the heritage maps of the Diputació, which unfold some pragmatic and symbolic aspects of the cataloguing and protection of trees.

*Spanish subtitles available on request.