Myrrhis Mill.
Myrrhis is a monotypic genus native of montane regions of southern and Central Europe. Its only species (M. odorata) is sometimes cultivated as a medicinal or ornamental plant or as herb (but apparently much less so in recent times).
Myrrhis represents an isolated lineage with no immediate relatives, thus deserving the status of monotypic genus (Downie & al. 2000).
Literature:
Downie S.R., Katz-Downie D.S. & Spalik K. (2000) A phylogeny of Apiaceae tribe Scandiceae: evidence from nuclear ribosomal DNA internal transcribed spacer sequences. American Journal of Botany 87: 76-95. [available online at: http://www.life.illinois.edu/downie/AJB2000A.pdf]
Lee B.-Y., Levin G.A. & Downie S.R. (2001) Relationships within the spiny-fruited umbellifers (Scandiceae subtribes Daucinae and Torilidinae) as assessed by phylogenetic analysis of morphological characters. Syst. Bot. 26: 622-642. [available online at: http://www.life.illinois.edu/downie/Levin2001.pdf]