''Isopogon petiolaris'' is a species of plant in the family

Proteaceae The Proteaceae form a family of flowering plants predominantly distributed in the Southern Hemisphere. The family comprises 83 genera with about 1,660 known species. Together with the Platanaceae and Nelumbonaceae, they make up the order Pro ...

and is endemic to eastern Australia. It is a low, spreading shrub with sharply-pointed, divided leaves and more or less spherical heads of yellow flowers.

Description

''Isopogon petiolaris'' is a low, spreading shrub that typically grows to a height of less than and has reddish brown branchlets. The leaves are mostly long,

pinnately Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

or ternately divided, the undivided part long, the lobes wide and sharply pointed. The flowers are arranged in sessile, more or less spherical heads in diameter, surrounded by leaves with

involucral bracts In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, ...

at the base. The flowers are long, yellow and more or less glabrous. Flowering occurs from July to November and the fruit is a hairy nut, fused with others in spherical to oval head in diameter.

Taxonomy

''Isopogon petiolaris'' was first formally described in 1830 by Robert Brown in the '' Supplementum'' to his '' Prodromus Florae Novae Hollandiae et Insulae Van Diemen'' from specimens collected in 1827 near Moreton Bay, by Allan Cunningham.

Distribution and habitat

''Isopogon petiolaris'' mostly grows in stony places in forest and heath from the Darling Downs in south-eastern Queensland and south through the Northern Tablelands to near Parramatta and west to the Pilliga forest and Parkes.

References

{{Taxonbar, from=Q18081771 petiolaris Flora of New South Wales Flora of Queensland Plants described in 1830 Taxa named by Robert Brown (botanist, born 1773)