About Leucopogon costatus (F.Muell.) J.M.Black
Leucopogon costatus is a slender shrub that is either erect or straggling and erect, and typically grows to a maximum height of 50 cm (20 in). Its young branchlets are covered in soft hairs. The leaves are broadly egg-shaped, measuring 1.5–5 mm (0.059–0.197 in) long and 1.0–3.5 mm (0.039–0.138 in) wide, with a base that clasps the stem. Flowers are arranged in spikes that hold up to four individual flowers, and the spikes are 4–7 mm (0.16–0.28 in) long. The spikes grow in leaf axils or at the ends of branches. Egg-shaped bracteoles 1.0–1.3 mm (0.039–0.051 in) long are present at the base of each flower. The sepals are egg-shaped, 1.6–2.3 mm (0.063–0.091 in) long. The petals are white, joined at the base to form a cylindrical or bell-shaped tube 1.1–1.5 mm (0.043–0.059 in) long. The petal lobes are 1.2–1.8 mm (0.047–0.071 in) long and densely bearded on their inner surface. This species grows in mallee, scrub and heathland habitats. It occurs in the Little Desert National Park and southern Big Desert regions of Victoria, and in the south-east of South Australia including Kangaroo Island.
