Did you mean: Pachyonychia
Achyronychia
Achyronychia is a monotypic genus of flowering plant containing the single species Achyronychia cooperi, which is known by the common names onyxflower and frost-mat. This plant is native to the Mojave and Sonoran Deserts of northern Mexico and the... Wikipedia
Scientific name: Achyronychia cooperi
Genus: Achyronychia; Torr. & A.Gray
Higher classification: Achyronychia