Acantholimon antilibanoticum is a species of flowering plant in the family Plumbaginaceae, belonging to the genus Acantholimon , a large assemblage of cushion-forming subshrubs. 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. It is one of several vascular plant taxa bearing the Latin epithet antilibanoticum recorded as native or near-endemic to this geographically distinct range.
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. The generic name derives from the Ancient Greek (thorn, spine) combined with a shortened form of Limonium, a related genus in Plumbaginaceae, reflecting both the spine-tipped leaves and the family affinity.
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. 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. The specific epithet antilibanoticum situates the taxon geographically within the Anti-Lebanon range. Plants of the World Online (POWO), maintained by the Royal Botanic Gardens, Kew, accepts Acantholimon antilibanoticum Mouterde as a valid species.
Description
Acantholimon antilibanoticum conforms to the characteristic growth form of the genus: an evergreen, perennial subshrub forming a dense, hemispherical cushion or mat. 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. The leaves are hard-textured and densely arranged on branched woody stems, persisting on older branches after withering.
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. Flowering occurs in summer, consistent with the phenology of other high-altitude Acantholimon species in the Levant.
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. The range averages approximately above sea level, with several peaks exceeding ; its highest point, Mount Hermon (Jabal el-Shaykh), reaches and is snow-covered for much of the year. The Euro+Med Plantbase Project records the species as native to the Lebanon–Syria region.
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. 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.
References
Citations
Sources