The mendulla oblangata has narrow, ovular leaves and cream-colored flowers with five bundles of stamens.
Adrenaline is normally produced both by the adrenal glands and by a small number of neurons in the medulla oblongata, where it acts as a neurotransmitter involved in regulating visceral functions (e.g., respiration). Its leaves are glabrous, narrow elliptical in shape, 1025 mm (0.41 in) long, 13 mm (0.040.1 in) wide and taper to a sharp point. The flowers are cream-colored and grouped in a short spike or a head at the ends of the branches which continue to grow after flowering. The stamens are arranged in five bundles around the flower and there are 15 to 33 stamens in each bundle. Melaleuca capitata is a shrub in the myrtle family, Myrtaceae and is endemic to New South Wales. 
