According to Brullo et al. (2003), Allium rausii is a diploid species (2n=16) and might be a relict. Also, due to its ecology and flowering period A. rausii is related to A. euboicum.

This species is endemic to Greece. The available information on Allium rausii is very limited, based on three collections and one publication with few data on habitat. Recent data on population size on Mt. Ossa (Nikolopoulos and Trigas unpublished data) are not adequate for a reliable estimation of population size, as the species' distribution seems to be imperfectly known. The habitat might be threatened at the localities on Mount Pilion and Mount Ossa, since it is close to areas with human activities. In the case of a disastrous event, such as a forest fire, the species' population would certainly decline, but this is unlikely in the deciduous forest. More research on the distribution of the species and potential threats is recommended. It is currently listed as Near Threatened (approaching Vulnerable B2ab(iii)).

Allium rausii has been found only in east and central Greece, at two localities. The first locality is on Mount Ossa near the village of Polydendri and the second locality is on Mount Pilion near the resort of Chania (Brullo et al. 2003). It is not known whether it may occur at other areas with similar habitat.

About 500 mature individuals were observed in Polydendri area (Mt. Ossa) in July 2023. No information is available on the population size on Mt. Pilion. Additional subpopulations are likely to occur in other areas, as the habitat of the species is common.

The species grows in the understorey of deciduous forests (oak, chestnut), on siliceous substrate.

The habitat might be threatened at the locality of Mount Pilion, since it is close to touristic areas with human activities. The subpopulation on Mt. Ossa occurs close to a recreation area and is threatened by human activities.

This species is not utilised.

There is no conservation action in place for the species. Both the localities lie within NATURA 2000 sites (GR1420007, GR1430008).