An olive tree collection planted for agronomic research in the 1980-90s is a biological resource used for outdoor visits, to students and other publics, with the aim to raise awareness about olive tree biodiversity. Nowadays this is relevant as olive tree cultivation is experiencing a shift from traditional to modern groves, planted with only a few varieties, which is a factor leading to genetic erosion.

The collection has several varieties from Portugal and other 5 countries: France, Greece, Italy, Morocco and Spain. Some are: Arbequina (SP); Branquita (PT); Carolea (GR); Leccino (IT); Manzanilla (SP); Picholine Marocaine (MAR) and Picholine (FR).

Outdoor visits have helped students and wider publics to learn about olive tree biodiversity (Lima, 2020). The collection is managed by a partnership between INIAV, I.P. and Oeiras Municipality, with collaboration of 2 national Olive tree nurseries, which offer new Portuguese olive tree varieties (e.g., Lentisca; Bical) to broaden the collection varieties.