About Petrophile teretifolia R.Br.
Petrophile teretifolia R.Br. is an erect or spreading shrub that typically grows 0.1 to 2 meters (3.9 inches to 6 feet 6.7 inches) tall, and has hairless branchlets and leaves. Its leaves are needle-shaped with blunt tips, and measure 40 to 200 millimeters (1.6 to 7.9 inches) long. Flowers are arranged in leaf axils or at the ends of branches, forming oval to roughly spherical heads about 15 millimeters (0.59 inches) long, with a few involucral bracts at the base of each head. The heads are either sessile or sit on a 2 to 3 millimeter (0.079 to 0.118 inch) long peduncle. Individual flowers are 17 to 25 millimeters (0.67 to 0.98 inches) long, pink to mauve in color, and covered in hairs. Flowering occurs from September to January, and the fruit is a nut that is fused with other nuts into a spherical, oval or elliptic head 15 to 25 millimeters (0.59 to 0.98 inches) long. This species grows on granite outcrops, in heath, scrub, and sandplain, ranging between the Stirling Range and Israelite Bay in the Esperance Plains, Jarrah Forest and Mallee biogeographic regions of south-western Western Australia.
