According to existing data, Velebit is home to 1854 registered plant species, of which 79 are endemic. Such a great many endemic species is why Velebit is often called "the centre of endemism" of this part of Europe .
The essential habitats for these endemic plant species are the rocks and "gulles" (western Velebit slope), caves, rivers (Krupa and Zrmanja), as well as alpine meadows and grasslands. Among the Velebit endemics is the Velebit degenia (Degenia velebitica), the Croatian sibbirhaea (Sibiraea altaiensis ssp. Croatica), the Velebit bellflower (Campanula velebitica), the Window bellflower (Campanula fenestrellata), Kitajbel's primrose (Primula kitaibeliana), the Velebit dianthus (Dianthus velebiticus)… The rocky grounds and cliffs of Velebit are also home to peculiar and exquisite plant species – roseroot (Rhodiola rosea), Croatian barberry (Berberis croatica), twin-flowered violet (Viola biflora), creeping saxifrage (Saxifraga rotundifolia), mountain avens (Dryas octopetala), edelweiss (Leontopodium alpinum), and others.
Although forest habitats predominate on Velebit, the alpine meadows and grasslands are very important to the conservation of its overall biodiversity. The most widespread forest association in the mountain-vegetation belt, the beech forest with large red dead nettle (Lamio orvalae-Fagetum), inhabits altitudes below 900 meters. At altitudes above 800 m, dwell the Dinaric beech and fir forests (Omphalodo-Fagetum). The coastal beech forest with autumn moor grass (Seslerio autumnalis-Fagetum) prevails on the rocky plateaus above 1000 m. Subalpine forests of beech and hollyfern (Polystycho lonchitis-fagetum) inhabit areas from 1100 to 1650 m above sea level that are typically covered in snow, have a shore vegetation period, and are exposed to strong winds. The trees of these forests are bent at their lower section under the weight of the enduring snow. The main features of the top-most landscape are the bare, karst formations that alternate with forest valleys and dry grassland areas.