Acantholimon antilibanoticum

Acantholimon antilibanoticum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Plumbaginaceae
Genus: Acantholimon
Species:
A. antilibanoticum
Binomial name
Acantholimon antilibanoticum
Mouterde

Acantholimon antilibanoticum is a species of flowering plant in the family Plumbaginaceae, belonging to the genus Acantholimon Boiss., a large assemblage of cushion-forming subshrubs.[1] The species was described by the French Jesuit botanist Paul Mouterde and is named for the Anti-Lebanon mountain range, the limestone ridge that forms the majority of the border between Lebanon and Syria.[2][3] It is one of several vascular plant taxa bearing the Latin epithet antilibanoticum recorded as native or near-endemic to this geographically distinct range.[3]

Taxonomy and nomenclature

The genus Acantholimon was formally established by the Swiss botanist Pierre Edmond Boissier in 1846 in his Diagnoses Plantarum Orientalium Novarum, with Acantholimon glumaceum (Jaub. & Spach) Boiss. designated as the type species.[4] The generic name derives from the Ancient Greek ákantha (thorn, spine) combined with a shortened form of Limonium, a related genus in Plumbaginaceae, reflecting both the spine-tipped leaves and the family affinity.[5]

Acantholimon antilibanoticum was described by Paul Mouterde (1892–1972), a French Jesuit missionary and naturalist who served as professor at Saint Joseph University in Beirut.[6] Mouterde's principal botanical contribution was the Nouvelle Flore du Liban et de la Syrie, a three-volume work published between 1966 and 1983, which remains the most comprehensive floristic reference for the Lebanese and Syrian flora.[2][7][8] The specific epithet antilibanoticum situates the taxon geographically within the Anti-Lebanon range.[3] Plants of the World Online (POWO), maintained by the Royal Botanic Gardens, Kew, accepts Acantholimon antilibanoticum Mouterde as a valid species.[1]

Description

Acantholimon antilibanoticum conforms to the characteristic growth form of the genus: an evergreen, perennial subshrub forming a dense, hemispherical cushion or mat.[9] Leaves are linear, rigid, acuminate, and spine-tipped, a suite of morphological features that minimise the exposed leaf surface and deter browsing by large herbivores, and that are strongly associated with the water-stressed, substrate-poor subalpine habitats favoured by the genus.[9] The leaves are hard-textured and densely arranged on branched woody stems, persisting on older branches after withering.[10]

As is typical across the genus, the inflorescence is borne on a short, simple or branched flowering stem. Flowers comprise a funnel-shaped calyx with a flared membranous margin that persists after anthesis and facilitates wind dispersal, and five spreading petals.[11] Flowering occurs in summer, consistent with the phenology of other high-altitude Acantholimon species in the Levant.[11]

Distribution and habitat

Acantholimon antilibanoticum is native to the Anti-Lebanon range, a southwest-to-northeast-trending mountain chain running parallel to Mount Lebanon and separated from it by the Beqaa Valley.[12] The range averages approximately 2,000 metres (6,600 ft) above sea level, with several peaks exceeding 2,400 metres (7,900 ft); its highest point, Mount Hermon (Jabal el-Shaykh), reaches 2,814 metres (9,232 ft) and is snow-covered for much of the year.[12] The Euro+Med Plantbase Project records the species as native to the Lebanon–Syria region.[3]

The species grows in the gravelly and stony soils or on exposed rocky substrates characteristic of mid- to upper-elevation mountain habitats favoured by Acantholimon throughout its range.[9] It is a component of the tragacanth cushion-plant vegetation typical of Irano-Turanian subalpine slopes in the Levant; plant communities shaped by strong winds, seasonal snow cover, summer drought, and thin rocky soils.[9][11]

References

Citations

Sources

  • Boissier, Pierre Edmond (1846). Diagnoses Plantarum Orientalium Novarum. ser. 1, no. 7. Leipzig: B. Hermann.
  • Charpin, A.; Greuter, W. (1978). Nouvelle Flore du Liban et de la Syrie, Tome III. Posthumously edited; authored by Paul Mouterde†. Beirut: Dar El-Machreq.
  • El Zein, Hicham; Fois, Mauro; Gori, Benedetta; Bacchetta, Gianluigi (2025). "Endemism patterns of the vascular flora of Lebanon: A dynamic checklist". PhytoKeys (260): 153–184. Bibcode:2025PhytK.260..153E. doi:10.3897/phytokeys.260.156938. PMC 12322683. PMID 40765900.
  • "Anti-Lebanon Mountains". Encyclopædia Britannica. 2024. Retrieved 2026-06-08.
  • Euro+Med Plantbase Project (2023). "Acantholimon antilibanoticum Mouterde". Retrieved 2026-06-08.
  • Lebanon Flora (2015). "Acantholimon antilibanoticum Mouterde". Retrieved 2026-06-08.
  • GBIF (2025). "Acantholimon Boiss. — GBIF Backbone Taxonomy". Retrieved 2026-06-08.
  • Plants of the World Online (2025). "Acantholimon antilibanoticum Mouterde". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2026-06-08.
  • Moharrek, Farideh; Sanmartín, Isabel; Kazempour-Osaloo, Shahrokh; Nieto Feliner, Gonzalo (2019). "Morphological Innovations and Vast Extensions of Mountain Habitats Triggered Rapid Diversification Within the Species-Rich Irano-Turanian Genus Acantholimon (Plumbaginaceae)". Frontiers in Genetics. 9 698. doi:10.3389/fgene.2018.00698. PMC 6360523. PMID 30745908.
  • Mouterde, Paul (1966). Nouvelle Flore du Liban et de la Syrie. Vol. 1. Beirut: Éditions de l'Imprimerie catholique.
  • Mouterde, Paul (1970). Nouvelle Flore du Liban et de la Syrie. Vol. 2. Beirut: Dar El-Machreq.
  • Wikispecies: Paul Mouterde (2022). "Paul Mouterde — Wikispecies". Retrieved 2026-06-08.
  • World Flora Online (2025). "Acantholimon Boiss". Retrieved 2026-06-08.
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