About Thryptomene micrantha Hook.fil.
Thryptomene micrantha, commonly known as ribbed thryptomene, is a woody shrub with a spreading to erect growth form. It typically reaches a height of 0.3 to 1.5 metres (1 foot 0 inch to 4 feet 11 inches). Its leaves are crowded, egg-shaped with the narrower end toward the base, arranged in opposite pairs. Each leaf is 4 to 6 millimetres (0.16 to 0.24 inches) long, 1 to 2.5 millimetres (0.039 to 0.098 inches) wide, and attached to a short petiole. Flowers form in the upper leaf axils, either singly or in groups of up to three. Each flower sits on a pedicel about 1 millimetre (0.039 inches) long. The floral cup is cylindrical with thin longitudinal ridges, and the five sepals are egg-shaped and 1 to 2 millimetres (0.039 to 0.079 inches) long. The five petals are white, egg-shaped, and about 1 millimetre (0.039 inches) long, and each flower has five stamens. Flowering occurs mainly from August to October. This species occurs in scattered populations across South Australia, Victoria, and Tasmania, where it grows in heath or woodland, and sometimes in shrubland on rocky slopes. In Victoria, it is found in the Gippsland Lakes region. In Tasmania, most populations are restricted to Freycinet National Park. In South Australia, it occurs mainly on the Eyre and Yorke peninsulas.
