About Petrophile serruriae R.Br.
Petrophile serruriae is an erect or spreading shrub that usually grows to between 0.2 and 1.5 meters (7.9 inches to 4 feet 11.1 inches) tall. Its branchlets and leaves are covered in silky hairs, and the species does not form a lignotuber. The leaves are either bipinnate or tripinnate, measuring 15 to 34 millimeters (0.59 to 1.34 inches) long, and grow from a 2 to 10 millimeter (0.079 to 0.394 inch) long petiole. Most leaves have 27 to 35 needle-shaped, sharply-pointed lobes. Flowers grow at the ends of branchlets and in leaf axils, arranged in oval flower heads around 10 millimeters (0.39 inches) in diameter. A small number of deciduous involucral bracts are present at the base of each flower head. Individual flowers are 13 to 16 millimeters (0.51 to 0.63 inches) long, covered in silky hairs, and can be yellow, greyish mauve, or pink. Flowering occurs mainly from July to December. The fruit is a nut that remains fused with other nuts in an oval to spherical head 10 to 12 millimeters (0.39 to 0.47 inches) in diameter. This plant is common in coastal limestone habitat, and is widespread across south-western Western Australia, ranging from near Geraldton to near Albany.
