The existing flora presents a clearly marked type of vegetation-levels
according to the altitude.
- The transitional zone streches above the short-grown meadow up to about 350 m above sea level. It is mainly composed of rushes (Juncus effusus) and of club-rushes (Scirpus nodosus) along with bulrushes (Scirpus aucklandicus) and little ferns Blechnum penna-marina. The residual area of phylica trees (Phylica nitida) streches out on the eastern slope between the "Grand Bois" (large forest) and the "Chaudron" (the cauldron).
- The cryptogamic vegetation is located on the upper level and up to 500 m high. The steep slopes are mainly planted with ferns Gleichenia polypodioides (polypods). The gentler slopes are planted with ferns Etaphoglossum succaessifolium , Blechnum penna-marina and varied moss.
- The slopy peat-bog streches up to about 700 m high and is called " Plateau des Tourbieres " (peat-bog plateau). The peaty soil favours the development of moss, sphagums and a few graminaceae such as Poa fuegiania.
- The swampy peat-bog is located inside La Dives calderia and in a few zones of the " Plateau des Tourbieres ". It is nearly exclusively composed of moss, sphaga and hepaticae.