Halacsya is a monotypic genus of flowering plants belonging to the family Boraginaceae.[1] It only contains one species, Halacsya sendtneri (Boiss.) Dörfl. [2]
It is native to the Balkan Peninsula and is found in Albania, Greece and the former Yugoslavia.
It has one known subspecies; Halacsya sendtneri subsp. devollensis (from Albania).[2]
The genus name of Halacsya is in honour of Eugen von Halácsy (1842–1913), an Austrian physician and botanist of Hungarian descent.[3] The Latin specific epithet of sendtneri refers to Otto Sendtner, (1813–1859) a German botanist and phytogeographer. Halacsya sendtneri was first described and published in Exsicc. (Herb. Norm.) Vol.44 on page 103, n.º 4364 in 1902.
In 2020, the Republic of Kosovo issued a set of postage stamps with images of various flora including Halacsya sendtneri.[4]