Prostanthera sejuncta: is a member of the Lamiaceae family and is a Spiny Mintbush.
Prostanthera sejuncta is a scrambling, more or less prostrate shrub that may reach a height of 50 centimetres. The many, spreading branches have spines up to 16 millimetres long at the base of each of the opposite leaves. The leaves are small, about one centimetre long, narrowly ovate with short stalks, aromatic, pale to deep green above and paler beneath.
The flowers are 1.5 centimetres long, pale mauve to pale lilac with orange blotches on the lower lobe and purplish dots in the throat. They may be scattered or profuse. The main flowering period is from July to December but plants usually carry a few flowers throughout the year.
Prostanthera sejuncta used to be included in the Prostanthera spinosa complex. In 1995 the species was split into three. Populations in parts of Victoria and South Australia remain as Prostanthera spinosa. A population from Mount Arapiles, in Victoria, became Prostanthera arapilensis. The small population in Fortis Creek National Park near Grafton, northern New South Wales became Prostanthera sejuncta. Prostanthera arapilensis is probably the most colourful of the three species.
The photograph, of Prostanthera sejuncta, was taken in Fortis Creek National Park in July 2008. This plant had grown into a dense, mounded ground cover that was at least 30 centimetres thick with dense interlocking branches.
Because of its limited distribution this Mintbush is classified as rare. Fortunately most populations are protected in Fortis Creek National Park.
Prostanthera sejuncta could be cultivated as an interesting ground cover in native garden beds.
Propagate from cuttings.