Nemesia caerulea is a blue to purple flowered herbaceous

Forb

A forb is a herbaceous flowering plant that is not a graminoid . The term is used in biology and in vegetation ecology, especially in relation to grasslands and understory.-Etymology:...

 perennial member of the Scrophulariaceae

Scrophulariaceae

Scrophulariaceae, the figwort family, are a family of flowering plants. The plants are annual or perennial herbs with flowers with bilateral or rarely radial symmetry. Members of the Scrophulariaceae have a cosmopolitan distribution, with the majority found in temperate areas, including...

 or Figwort Family. The plant is native to the Cape Floristic Province of southwestern South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

 where it grows at low elevations on fully exposed north-facing and northwest-facing slopes in association with other native grasses and forbs. Its chromosome number is 2n=18.