Halacsya is a monotypic genus of flowering plants belonging to the family Boraginaceae.

[1] It is native to the Balkan Peninsula and is found in Albania, Greece and the former Yugoslavia.

[1] 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.

[1] In 2020, the Republic of Kosovo issued a set of postage stamps with images of various flora including Halacsya sendtneri.