Sparaxis is a genus in the Iridaceae family that is endemic to South Africa and found mostly in the southwestern Cape and the western Karoo.

Sparaxis calcicola, commonly known as Lime Silklily or Limestone Satinflower, is a rare South African endemic species found in the Western Cape province, immediately north and west of Saldanha Bay. It occurs in seasonally damp places in rocky limestone hills and calcrete near the coast. Plants grow from 12 to 22 cm and flower from early August to mid-September. Corms have tunics of fine, netted fibers. The lightly lemon scented flowers are bilaterally symmetrical with creamy white upper tepals and a suberect larger dorsal tepal and yellow lower tepals with dark marks at the limb base. The upper laterals spread at right angles to the tube and the lower tepals are united, narrowed at the base into claws.