There
are over 4000 plant species in Azerbaijan, including 240 indigenous varieties.
Due the unique climate in Azerbaijan, the flora is much richer in the number
of species than the flora of the other republics of the South Caucasus.
Oaks (Quercus castaneifolia), hornbeam, beech, ash and maple forests cover the lower slopes of the mountain ranges, orange groves carpet the southern coastal lowlands and mulberry trees abound in the north.
Relict
genera of the tertiary period can be frequently found in all the zones
of Azerbaijan, especially in Lenkeran. They are the iron tree (Parrotia
persica), the Lenkoran acacia (Albizzia julibrissin), the basket oak (Quercus
castaneifolia), the Caucasian persimmon (Diospyrus lotus), the evergreen
shrub of Ruscus hyrcana, the box tree (Buxus hyrcana), etc
State Reserves of Azerbaijan
* Goy-Gol State Reserve
* Gyzylaghadj State Reserve
* Zagatala State Reserve
* Turyanchay State Reserve
* Pirgulu State Reserve
* 
Shirvan
State Reserve
* Besitchay State Reserve
* Qarayazy State Reserve
* Ismayilly State Reserve
* Qaragol State Reserve
* Ilisu State Reserve
* Shahbuz State Reserve
* Eldar pine-tree State Reserve
National
Parks of Azerbaijan
* Ordubad National Park
* Shirvan National Park
* Ag-Gol National Park
* Hirkan National Park
* Altyaghach National Park
* Absheron National Park
State Game Reserves
of Azerbaijan
Major Caucasus:
* State Game Reserve of Shaki
* State Game Reserve of Qusar
* State Game Reserve of Qabala
* State Game Reserve of Ismailly
* State Game Reserve of Qakh
Minor Caucasus:
* State Game Reserve of Qubadly
* State Game Reserve of Lachyn
* State Game Reserve of Dashalty
* State Game Reserve of Qyzyldja
* State Game Reserve of Arazboyu