Typification of the Linnaean name Rhamnus tinctoria, the basionym of Flueggea tinctoria (Euphorbiaceae), an endemic plant to the Iberian Peninsula flora

The name Rhamnus tinctoria was published in 1758 by Linnaeus in Loefling’s Iter Hispanicum. The work was published posthumously after Loefling’s death in Venezuela in 1756. Although Linnaeus received specimens from Loefling’s Iberian collections, several were lost, so Linnaeus relied on Loefling’s notes for these taxa. Since it was impossible to find original material of Rhamnus tinctoria in the various Linnaean and Linnaean-associated herbaria, a neotype has been designated for this Linnaean name. The neotype selected is a specimen preserved at MA, collected in central Spain (Talavera de la Reina, Toledo). This specimen belongs to the exsiccatum “E. Bourgeau. Plantes d’Espagne” (number 2492), which contains several duplicates (e.g., at P, barcodes P05595291, P05503187, P05502243).