Isopogon sphaerocephalus

Drumstick isopogon
	In John Forrest National Park
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Proteales
Family:	Proteaceae
Genus:	Isopogon
Species:	I. sphaerocephalus
Binomial name
	Isopogon sphaerocephalus; Lindl.
	Occurrence data from Australasian Virtual Herbarium
Synonyms
	Atylus sphaerocephalus(Lindl.) Kuntze ; Isopogon eriocladus Gand. ; Isopogon ovoideus Gand.;

Last updated December 19, 2020

Isopogon sphaerocephalus, commonly known as drumstick isopogon^[2] or Lesueur isopogon,^[3] is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with linear to narrow egg-shaped leaves and spherical heads of hairy white to creamy yellow flowers.

Description

Isopogon sphaerocaphalus is a shrub that typically grows to a height of 0.3–2 m (1 ft 0 in–6 ft 7 in) and has hairy brownish young branchlets and hairy young leaves. The leaves are linear to egg-shaped with the narrower end towards the base, 50–160 mm (2.0–6.3 in) long and 4–18 mm (0.16–0.71 in) wide with a small point on the end. The flowers are arranged on the ends of branchlets in sessile, spherical heads 25–30 mm (0.98–1.18 in) in diameter with hairy, egg-shaped involucral bracts at the base. The flowers are densely hairy, white to pale or creamy yellow and up to 15 mm (0.59 in) long. Flowering occurs from July to January and the fruit is a hairy nut, fused with others in a conical to oblong head 20–30 mm (0.79–1.18 in) in diameter.^[4]^[5]^[6]

Taxonomy

Isopogon sphaerocephalus was first formally described by botanist John Lindley in A sketch of the vegetation of the Swan River Colony in 1839.^[7]^[8]

In 2019, Barbara Lynette Rye described two subspecies of I. sphaerocephalus in the journal Nuytsia but the names have not been assessed by the Australian Plant Census as at November 2020:

Isopogon sphaerocaphalusLindl. subsp. sphaerocephalus, commonly known as "drumstick isopogon";^[2]
Isopogon sphaerocaphalus subsp. lesueurensisRye, commonly known as "Lesueur isopogon"^[3] has a longer pollen presenter, hairier branchlets and leaves and more crowded, broader leaves than the autonym.^[5]

The specific epithet (sphaerocephalus) means "spherical-headed",^[9]^:310 and lesueurensis refers to Mount Lesueur, where this subspecies occurs.^[9]^:367

Distribution and habitat

Subspecies sphaerocephalus grows in Jarrah forest between Gidgegannup, the Scott River area and the Kent River in the Jarrah Forest, Mallee, Swan Coastal Plain and Warren biogeographic regions.^[2]^[5] Subspecies lesueurensis grows in shrubland on and near the sides and bases of hills in the Mount Lesueur area.^[3]^[5]

Conservation status

Both subspecies of I. sphaerocephalus are listed as "not threatened" by the Western Australian Government Department of Parks and Wildlife.^[2]^[3]

Related Research Articles

Isopogon, commonly known as conesticks, conebushes or coneflowers, is a genus of about forty species of flowering plants in the family Proteaceae, and are endemic to Australia. They are shrubs with rigid leaves, bisexual flowers in a dense spike or "cone" and the fruit is a small, hairy nut.

Isopogon formosus, commonly known as rose coneflower, is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with divided leaves with cylindrical segments, and spherical to oval heads of pink or red flowers.

Isopogon cuneatus, commonly known as coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with oblong to egg-shaped leaves with the narrower end towards the base, and flattened-spherical heads of glabrous pale to purplish pink flowers.

Banksia bipinnatifida is a species of shrub that is endemic to Western Australia. It is a prostrate shrub with a lignotuber, an underground stem, only a few divided leaves, large cream-coloured to pale yellow flowers and large fruit.

Banksia squarrosa, commonly known as pingle, is a species of prickly shrub that is endemic to Western Australia. It has linear to narrow lance-shaped leaves with up to ten sharply-pointed teeth on each side, yellow flowers in heads of about sixty and later, up to seven oblong to egg-shaped follicles in each head.

Isopogon dubius, commonly known as pincushion coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with sharply-pointed, deeply lobed or pinnate leaves and more or less spherical heads of pink to reddish pink flowers.

Isopogon asper is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a low shrub with crowded pinnate leaves and flattened spherical heads of glabrous pink flowers.

Isopogon divergens, commonly known as spreading coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with pinnate leaves and more or less spherical heads of glabrous pink flowers followed by an oval to cylindrical fruiting cone.

Isopogon teretifolius, commonly known as nodding coneflower, is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is an erect shrub with cylindrical, sometimes branched leaves, and flattened-spherical heads of hairy pinkish flowers.

Isopogon spathulatus is a species of flowering plant in the family Proteaceae and is endemic to south-western Western Australia. It is a shrub with linear to egg-shaped leaves with the narrower end towards the base, and more or less spherical heads of hairy pink flowers.

Petrophile antecedens is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a small, erect, open shrub with sharply-pointed, cylindrical leaves and spherical heads of hairy, pale cream-coloured flowers.

Petrophile clavata is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with curved, needle-shaped, sharply-pointed leaves and spherical heads of hairy, cream-coloured to very pale yellow flowers.

Petrophile conifera is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a bushy, much-branched shrub with pinnate, sharply-pointed leaves, and oval heads of hairy, cream-coloured to yellowish white flowers.

Petrophile filifolia is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a small shrub with curved, long, needle-shaped leaves and more or less spherical heads of hairy cream-coloured to pale yellow flowers.

Isopogon crithmifolius is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with divided leaves and more or less spherical heads of glabrous reddish pink flowers.

Isopogon pruinosus is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a compact, spreading shrub with narrow egg-shaped leaves with the narrower end towards the base and spherical to elliptic heads of pink flowers.

Isopogon scabriusculus is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with cylindrical, or narrow flat, sometimes forked leaves, and spherical to oval heads of pink or red flowers.

Isopogon heterophyllus is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a shrub with simple or pinnate, cylindrical leaves and hairy, usually pink flowers.

Isopogon panduratus is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a spreading shrub with narrow egg-shaped leaves and spherical heads of pale pink flowers.

Petrophile septemfida is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with leaves usually with seven lobes divided almost to the midrid, and spherical heads of cream-coloured to pale yellow flowers on the ends of branchlets.

References

1 2 "Isopogon sphaerocephalus". Australian Plant Census. Retrieved 27 November 2020.
1 2 3 4 "Isopogon sphaerocephalus subsp. sphaerocaphalus". FloraBase . Western Australian Government Department of Parks and Wildlife.
1 2 3 4 "Isopogon sphaerocephalus subsp. lesueurensis". FloraBase . Western Australian Government Department of Parks and Wildlife.
↑ Foreman, David B. "Isopogon sphaerocaphalus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 28 November 2020.
1 2 3 4 Rye, Barbara L.; Mcfarlane, Terry D. (2019). "A new name, clarification of synonymy, and a new subspecies for Isopogon (Proteaceae) in Western Australia" (PDF). Nuytsia. 30: 309–316. Retrieved 28 November 2020.
↑ "Isopogon sphaerocephalus". FloraBase . Western Australian Government Department of Parks and Wildlife.
↑ "Isopogon sphaerocephalus". APNI. Retrieved 28 November 2020.
↑ Lindley, John (1840). A Sketch of the Vegetation of the Swan River Colony. London: James Ridgway. p. xxxiv. Retrieved 28 November 2020.
1 2 Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. ISBN 9780958034180.

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[APC-1] 1 2 "Isopogon sphaerocephalus". Australian Plant Census. Retrieved 27 November 2020.

[FloraBase1-2] 1 2 3 4 "Isopogon sphaerocephalus subsp. sphaerocaphalus". FloraBase . Western Australian Government Department of Parks and Wildlife.

[FloraBase2-3] 1 2 3 4 "Isopogon sphaerocephalus subsp. lesueurensis". FloraBase . Western Australian Government Department of Parks and Wildlife.

[ABRS-4] Foreman, David B. "Isopogon sphaerocaphalus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 28 November 2020.

[Nuytsia-5] 1 2 3 4 Rye, Barbara L.; Mcfarlane, Terry D. (2019). "A new name, clarification of synonymy, and a new subspecies for Isopogon (Proteaceae) in Western Australia" (PDF). Nuytsia. 30: 309–316. Retrieved 28 November 2020.

[FloraBase-6] "Isopogon sphaerocephalus". FloraBase . Western Australian Government Department of Parks and Wildlife.

[APNI-7] "Isopogon sphaerocephalus". APNI. Retrieved 28 November 2020.

[Lindl.-8] Lindley, John (1840). A Sketch of the Vegetation of the Swan River Colony. London: James Ridgway. p. xxxiv. Retrieved 28 November 2020.

[Sharr-9] 1 2 Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. ISBN 9780958034180.

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