Pseudopodospermum libanoticum, also known as Lebanese salsify and Lebanese viper's grass, is a species of perennial plant in the family Asteraceae.
Pseudopodospermum libanoticum is a perennial herbaceous plant reaching a height of . It features a vertical thickened root that develops into a dry, hard taproot, crowned by a scaly collar. The stems are erect, leafy and branched primarily in the upper portion, initially covered by a detachable fluffy coating of stellate hairs that imparts a greyish-green hue, particularly on younger growth, before becoming glabrescent. The leaves are whole, slightly toothed towards the base, oblong or oblong-lanceolate, more or less acute that narrow at the petiole Its erect flower stems are leafy and branched in the upper part into 3-5 floral heads measuring . The flower heads are supported by a scaly receptacles atop long pedicels. It has glabrous cylindrical involucral bracts that are truncated at the base and slightly constricted at the top. The yellow flowers turn purple-red at the base and are larger than the involucre. It blooms in June and July. The fruit is a white, thick, long and deeply furrowed achene surmounted by a small pappus.
The accepted scientific name for this species is Pseudopodospermum libanoticum (Boiss.) Zaika, Sukhor. & N.Kilian, which was first published in 2020. This binomial reflects its current placement in the genus Pseudopodospermum within the family Asteraceae. The original name under which the species was first described, is Scorzonera libanotica Boiss., published by the Swiss botanist Pierre Edmond Boissier in Diagnoses Plantarum Orientalium. Boissier described the plant based on specimens collected from the Levant, establishing it within the genus Scorzonera at the time. An additional synonym is Aslia libanotica (Boiss.) Yñld., which was proposed but invalidly published. The genus name Pseudopodospermum derives from the Greek words pseudo- , meaning "false", and Podospermum, from pous, podos meaning "foot" and sperma meaning "seed", alluding to the achene morphology that superficially resembles but differs from that of the related genus Podospermum. The specific epithet libanoticum is a Latinized form referring to Lebanon, where the species was initially documented.
Historically, Pseudopodospermum libanoticum was long classified under Scorzonera following Boissier's description. Its transfer to Pseudopodospermum occurred in 2020 as part of a comprehensive taxonomic reassessment of Scorzonera, driven by molecular phylogenetic analyses, using ribosomal DNA and plastid markers, and detailed carpological studies that distinguished distinct clades based on achene anatomy and morphology, separating this species from core Scorzonera.
Pseudopodospermum libanoticum is endemic to the mountainous regions of the Levant, with its native range confined to Lebanon and Syria; it grows in elevated meadows and pastures, rocky and grassy grounds, and old wall cracks. The species has been documented across an elevational range of , adapting to montane temperate environments. Its extent of occurrence is 2,480 kmò and area of occupancy is 48 kmò, occurring in five locations. Modern surveys confirm its presence in protected areas such as Horsh Ehden Nature Reserve in northern Lebanon.
In traditional medicine of the Levant region, particularly among communities surrounding Mount Hermon in Lebanon and Syria, the aerial parts (stems, leaves, and flowers) of Pseudopodospermum libanoticum are decocted to prepare an oral infusion used for headache relief, aligning with broader Asteraceae family ethnomedicinal patterns in the Levant. The potential therapeutic effects, such as anti-inflammatory properties that may contribute to headache alleviation, are hypothesized to stem from sesquiterpenes and flavonoids present in related Pseudopodospermum and Scorzonera species within the Asteraceae family.
Pseudopodospermum libanoticum is used as a wild leaf vegetable in traditional Lebanese cuisine, where its basal rosettes and leaves are gathered and consumed either raw in salads or cooked, often incorporated into mixtures known as sleeq (). Locally known as Dabeh Lebnani (), the plant's common name alludes to its resemblance to salsify-like root vegetables in the Asteraceae family, though its root is not widely reported as edible and remains underutilized. No industrial, agricultural, or significant ornamental roles have been documented for P. libanoticum, with its rarity and endangered conservation status limiting such potential applications.