Prostanthera grylloana

Prostanthera grylloana is a species of flowering plant in the family Lamiaceae and is endemic to Western Australia. It is a small, erect shrub with densely hairy branchlets, small, spatula-shaped leaves and red to pink flowers.

Description
Prostanthera grylloana is an erect shrub that typically grows to a height of 0.3–1.5 m and has densely hairy branchlets. The leaves are spatula-shaped, 3–5 mm long and about 2 mm wide on a petiole up to about 1 mm long. Both the petiole and leaf blade have a longitudinal groove so that the two sides of the leaves almost touch. The flowers are arranged singly in leaf axils, each flower on a pedicel 1–1.5 mm long. The sepals are 4–6 mm long and form a tube 4–4.5 mm long with two more or less triangular lobes about 2 mm long and 3–4 mm long. The petals are red to dull medium mauve-pink, 15–20 mm and fused to form a tube 10–14 mm long with two lips. The lower lip has three lobes, the centre lobe more or less triangular, 5 mm long and 2–3 mm wide, the side lobes about 2.5 mm long wide. The upper lip is 3.5–4 mm long and 4 mm wide with a central notch about 1 mm deep. Flowering occurs in February, May or from September to December.

Taxonomy
Prostanthera grylloana was first formally described in 1876 by Ferdinand von Mueller in his book Fragmenta phytographiae Australiae from specimens collected "in the desert around Ularing" by Jess Young. The specific epithet (grylloana) honours the actress Adelaide Ristori, the wife of the marchese Giuliano Capranica del Grillo.

Distribution and habitat
This mintbush grows on granite outcrops and ridges and on stony hills and undulating plains in the Avon Wheatbelt, Coolgardie, Mallee and Murchison biographic regions of Western Australia.

Conservation status
Prostanthera grylloana is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.