Endemic Flora of Israel

Israel's flora is unusually diverse for a country of its size. An Encyclopaedia Judaica entry reports about 2,800 wild plant species, including approximately 250 endemics.[2] Mako instead reports 2,288 plant species and 56 endemics.[3] A 2018 Israeli government publication gives a total of about 2,600 plant types, including 150 endemics, while a separate government booklet reports about 2,380 flowering plants, 160 of which "occur only here."[4][5] The sources do not provide a common reference date, taxonomic standard, or species-by-species checklist that would reconcile these estimates.

An endemic species has a range confined to a defined area, whereas a native or indigenous species may also occur in neighboring regions.[1] This distinction is important because the Encyclopaedia Judaica entry separately identifies 150 plants as "indigenous" and about 250 as endemic without explaining the relationship between the figures.[2] Geographic scope also matters: a 1999 flora checklist covered Israel and surrounding areas, including Jordan, Palestinian Authority areas, the Golan Heights, Mount Hermon, and Sinai, rather than Israel's political borders alone.[9]

Israel's botanical diversity is associated with its position at the meeting point of Africa, Europe, and Asia and with the Syrian-African Rift.[3] Its flora spans Mediterranean, Saharo-Sindi, and Irano-Turani geobotanical regions, together with enclaves of tropical and European vegetation.[2] This combination of climatic and geographic zones produces sharply different habitats over short distances, from Mediterranean mountains and coastal sands to the Negev desert. The coastal dunes are particularly important: 173 plant species recorded on sand represented 8.2% of Israel's flora and included 26% of the country's endemic species.[7]

Israel's Mediterranean coastal dunes harbor a disproportionate share of the country's endemic flora. At the time of a peer-reviewed study, only about 17% of the dunes remained in good or reasonable ecological condition, and less than 5% of their area had protected status.[7] Industrial and urban development, tourism, recreation, and sand mining were identified as major causes of rarity among dune-dwelling species.[7]

Several endemics are closely associated with the kurkar ridges and hamra-sand soils of the coastal plain. Allium tel-avivense (שום תל-אביבי) grows in these coastal soil types.[10] Rumex rothschildianus (חומעת האווירון) occupies similar habitats and is critically endangered. Botanist Aharon Aaronsohn identified it and gave it a scientific name honoring Baron Rothschild.[10] Accelerated construction and road-building have destroyed substantial portions of the habitat used by these and other coastal plants.[10]

Israel's Red Book records 414 endangered plant species and reports that 36 species have become extinct since the 1960s.[11] The figure of 414 endangered plants is also reported in a separate conservation overview.[3] An updated assessment classified 413 species as endangered in 2019, including 40 endemic and sub-endemic plants identified as conservation priorities.[12] Separately, Israel's Fifth National Report to the Convention on Biological Diversity describes a 2011 Israel Nature and Parks Authority action plan that selected 40 endemic species for individual conservation plans, emphasizing Israel's responsibility for plants unique to its territory.[6]

Between 2007 and 2014, the Israeli Plant Gene Bank received 1,300 native plant species, approximately 48% of Israel's flora, including 280 endangered species. These holdings included 39 endangered endemic species, reported as 97% of that category.[6] Conservation measures include population monitoring, seed banking, cultivation in refuge gardens, and reintroduction through sowing or planting.[3] For iris species, Nature and Parks Authority teams return cultivated or relocated rhizomes to wild sites and assess establishment through flower counts.[8]

Habitat loss and fragmentation remain the principal threat to Israel's terrestrial biodiversity.[6] Agriculture, construction, roads, construction-waste dumping, vehicle damage, and invasive species have all affected coastal-plain populations.[8] Dune-dependent plants face the additional problem that less than 5% of the coastal dune area covered by the cited study had protected status.[7]

Irises are among Israel's most recognizable endemic and near-endemic plants, although sources differ on the number of wild species. A 2018 Ynet article reports 16 wild iris species, while a 2025 Maariv article refers to about 17 members of the iris family in Israel.[10][8] Iris atropurpurea (Iris argaman, the purple iris) is endemic to Israel and was formerly distributed along the coastal plain from Ashdod to the Carmel Coast before rapid development destroyed most of its population.[13] Surviving concentrations occur around Ness Ziona, Netanya, and Rishon LeZion.[14] A Supreme Court decision prevented a real-estate development at Iris Hill in Ness Ziona, although the Society for the Protection of Nature in Israel warned that the site remained vulnerable without a completed national-park declaration.[14] Nature and Parks Authority teams also return cultivated or relocated rhizomes to the wild and monitor flowering.[8]

Iris hador grows naturally only in the Upper Galilee and on the slopes of the Naphtali Mountains. It flowers mainly in March and was brought close to extinction by extensive picking before nature-protection laws enabled a partial recovery; it remains endangered.[13] Iris haynei grows on Mount Gilboa and in a narrow strip in Samaria, while Iris vartanii grows in mountainous areas, especially the Carmel.[10] The updated red list also names the Hermon and Negev irises among endemic or sub-endemic conservation priorities.[12] Monitoring programs cover Iris haynei in the Gilboa and reintroduced populations of Iris hador in the Upper Galilee.[8] The Nazareth iris, Iris bismarckiana, is reported from Mount Moreh to Metulla, southern Lebanon, and Mount Hermon, making it a regional endemic rather than a species confined to Israel.[15]

Iris Tuvia, found only in the Israeli Negev, was originally called Iris Uziyahu before being renamed in memory of botanist Tuvia Kushnir.[13] Tuvia's autumn crocus grows only in the Judean Desert; Kushnir discovered it on Mount Herod, or Herodium, and Professor Feinbrun later named it in his memory.[13]

Beyond the irises, Hormuzakia negevensis (לשון שור נגבית) has an exceptionally restricted range. It occupies only about one or two dunams in Mishor Yamin in the Negev, numbers several dozen individuals, and is critically endangered. Israeli ecologist Avinoam Danin discovered it in 1994.[10] On the Carmel, Allium autumnale is described as the only plant endemic specifically to that mountain range. Verbascum levanticum, Euphorbia dendroides, Brassica cretica, and Genista fasselata are reported as occurring in Israel only on the Carmel, though the source does not classify them as nationally endemic.[16]

A Jewish Virtual Library overview lists cyclamen among several endemic flowers but does not identify a scientific species or provide a taxonomic basis, so it is not a secure species-level example.[17] Ramon marjoram, Ramon crocus, the painted orchid, Allium galilaeum, and several irises are among the endemic or sub-endemic plants named as national conservation priorities.[12]

The available sources do not converge on a single total for Israel's endemic plants. Mako reports 56 endemic species, while a 2018 government publication reports 150.[3][4] A separate government booklet gives 160, and Encyclopaedia Judaica estimates about 250.[5][2] These sources use different overall flora totals and do not provide the checklists or methodological details needed to reconcile their figures.

The number 40 also appears in different contexts. Israel's Fifth National Report uses it for endemic species selected for individual conservation plans, whereas the updated red list groups 40 endangered endemic and sub-endemic species as priorities.[6][12] Neither figure is presented as a comprehensive total of all endemic flora. Geographic scope further complicates the issue because at least one cited botanical checklist covers a broader region that includes neighboring territories and countries.[9]