Dilijan National Park among four juniper species occurring in the national park. There are well conserved juniper stands on the rocky slopes of Mount Abeghakhar in the basin of the River Aghstev. The forests in the national park are rich in fruit trees and bushes such as oriental apple – "Malus orientalis", walnut - "Juglans regia", cornel - "Cornus mas", plum - "Prunus" spp., blackthorn - "Prunus spinosa", pear - "Pyrus communis" subsp. "caucasica", gooseberry - "Grossularia reclinata" ("Ribes reclinatum"), medlar - "Mespilus germanica", common hazelnut - "Corylus avellana" (see also Hazelnut Reservation), various species of Blackcurrant - "Ribes" spp., and hawthorn -
Prunus simonii is particularly aromatic, much more so than "Prunus salicina", with a comparatively high level of hexyl acetate, which gives apples their aroma. Plant breeder Luther Burbank devoted a lot of work to hybridizing this species with the Japanese plum ("Prunus salicina") and developed a number of cultivars from the hybrid. Of these, the cultivar 'Climax' was particularly notable for its importance to the fruit shipping industry of California. Other influential plum cultivars that Burbank developed with "P. simonii" ancestry include 'Maynard', 'Chalco', 'Santa Rosa', and 'Formosa'. Those two species and the European species "Prunus cerasifera" have contributed the majority of