Conostephium

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Conostephium
Conostephium pendulum.JPG
Pearl flower Conostephium pendulum
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Subfamily: Epacridoideae
Tribe: Styphelieae
Genus: Conostephium
Benth. [1]
Type species
Conostephium pendulum
Synonyms [1]

Conostephiopsis Stschegl.

Conostephium is a genus of flowering plants in the family Ericaceae and is endemic to the south-west of Western Australia. The name of the genus comes from Greek words, conos, "cone" and stephanos, "that which encircles, a crown or wreath", referring to the petal tube that encloses the stamens. [2] [3]

Contents

Description

Plants in the genus Conostephium are small evergreen shrubs with small to medium-sized simple leaves. The flowers occur singly in the axils of the leaves, have 5 sepals, 5 corolla petals joined at their bases into a long corolla tube, and 5 stamens. The fruit is a more or less fleshy drupe. [4]

Taxonomy

The genus was first formally described in 1837 by George Bentham, and the first species described was C. pendulum . There are 12 species in the genus, 4 having been added recently. The most distinctive features of the genus are the corolla tube which is conical in the upper half, the tiny corolla lobes and very long anthers which are fully enclosed within the corolla tube. These 3 features are thought to be adaptations to buzz pollination. [5] [6] The genus is most closely related to Brachyloma and Stenanthera but those genera have saccate corolla tubes, much larger corolla lobes and shorter anthers which extend partially beyond the corolla tube. [7]

After the description of C. pendulum in 1837, within ten years, two more were added - (C. minus and C. preissii). In 1859, the Russian botanist Sergei Sergeyevich Sheglejev described a new genus, Conostephiopsis in which he placed a new species (Conostephiopsis drummondii). At the same time, he transferred C. minus and C. preissii to the new genus, making Conostephium once more monotypic. In 1886, Bentham in Flora Australiensis grouped the two genera and added a fourth species ( Conostephium roei ). Much later, C. marchantiorum Strid (1986), C. uncinatum Moezel (1987) and C. magnum Cranfield (2002) were added. The latest additions were made (in 2013) by Michael Hislop, a botanical taxonomist at the Western Australian Herbarium [8]

Species

The following is a list of Conostephium species accepted by the Australian Plant Census as at March 2022: [9]

Distribution

All Conospermum species are endemic to the southwestern part of Western Australia. [10]

Related Research Articles

<i>Epacris impressa</i> Plant of the heath family, Ericaceae, that is native to southeast Australia

Epacris impressa, also known as common heath, is a plant of the heath family, Ericaceae, that is native to southeast Australia. French botanist Jacques Labillardière collected the species in 1793 and described it in 1805. Four forms have been identified, but no subspecies are recognised. Growing in heathland, shrubland or open forest, it is generally a small shrub around 0.5 to 1 m tall, with small stiff leaves. The red, pink or white tube-like flowers appear from late autumn to early spring. Honeyeater birds, particularly the eastern spinebill, feed upon the nectar of the flowers. It regenerates after bushfire by seed or by resprouting.

<span class="mw-page-title-main">Stamen</span> Male organ of a flower

The stamen is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium.

<i>Leucopogon</i> Genus of flowering plants

Leucopogon is a genus of about 150-160 species of shrubs or small trees in the family Ericaceae, in the section of that family formerly treated as the separate family Epacridaceae. They are native to Australia, New Zealand, New Caledonia, the western Pacific Islands and Malaysia, with the greatest species diversity in southeastern Australia. Plants in this genus have leaves with a few more or less parallel veins, and tube-shaped flowers usually with a white beard inside.

<i>Chamelaucium</i> Genus of flowering plants

Chamelaucium, also known as waxflower, is a genus of shrubs endemic to south western Western Australia. They belong to the myrtle family Myrtaceae and have flowers similar to those of the tea-trees (Leptospermum). The most well-known species is the Geraldton wax, Chamelaucium uncinatum, which is cultivated widely for its large attractive flowers.

<i>Gompholobium</i> Genus of legumes

Gompholobium, commonly known as glory peas or wedge-peas, is a genus of plants in the pea family Fabaceae and is endemic to Australia. Most species have compound leaves composed of three leaflets and all have ten stamens which are free from each other and a distinctive arrangement of their sepals.

<i>Hypocalymma</i> Genus of flowering plants

Hypocalymma is a genus of evergreen shrubs in the myrtle family Myrtaceae described as a genus in 1840. The entire genus is endemic to southern Western Australia.

<i>Petrophile</i> Genus of shrubs in the family Proteaceae

Petrophile is a genus of evergreen shrubs, in the family Proteaceae. The genus is endemic to Australia. Commonly known as conebushes, they typically have prickly, divided foliage and produce prominently-displayed pink, yellow or cream flowers followed by grey, conical fruits.

<i>Hemigenia</i> Genus of flowering plants

Hemigenia is a genus of flowering plants in the mint family, Lamiaceae and is endemic to Australia where most species occur in Western Australia, although some are also found in New South Wales and Queensland. Plants in this genus are shrubs or bushes with simple leaves and tube-shaped flowers with the petals forming two "lips" - the upper one with two lobes and the lower one with three.

<i>Brachyloma</i> Genus of flowering plants

Brachyloma is a genus of shrubs in the family Ericaceae. The genus is endemic to Australia.

<i>Conostephium pendulum</i> Species of flowering plant

Conostephium pendulum, commonly known as pearl flower, is a small, open shrub in the family Ericaceae endemic to the Swan Coastal Plain from Eneabba to Margaret River.

<i>Stenanthera</i> Genus of plants

Stenanthera is a genus of flowering plants in the family Ericaceae. Most are low shrubs with leaves that are paler on the lower surface, tube-shaped flowers and with the fruit a drupe. There are three species, formerly included in the genus Astroloma.

<i>Coleanthera</i> Genus of flowering plants

Coleanthera is a plant genus in the family Ericaceae. The genus is endemic to Western Australia, and is currently accepted by Plants of the World online, and the Council of Heads of Australasian Herbaria, but not by the Western Australian Herbarium, where it has been subsumed into the genus, Styphelia, for the phylogenetic reasons given by Darren M. Crayn, Michael Hislop and Caroline Puente-Lelièvre.

<i>Conostephium minus</i> Species of flowering plant

Conostephium minus, common name pink-tipped pearl flower, is a species of flowering plant in the family Ericaceae and is endemic to the southwest of Western Australia. It is an erect shrub with linear leaves and white and purplish-pink flowers.

<i>Styphelia stricta</i> Species of flowering plant

Styphelia stricta is a small plant in the family Ericaceae. It is endemic to Western Australia.

Conostephium marchantiorum is a species of flowering plant in the heath family Ericaceae and is endemic to the south-west of Western Australia. It is an erect shrub with linear leaves clustered near the ends of branchlets, and pale green and pink, densely-bearded, tube-shaped flowers.

<i>Conostephium preissii</i> Species of flowering plant

Conostephium preissii is a species of flowering plant in the family Ericaceae and is endemic to the southwest of Western Australia. It is an erect shrub with many stems, egg-shaped to oblong leaves and white and purplish to reddish-pink flowers.

Conostephium prolatum is a species of flowering plant in the family Ericaceae and is endemic to the south of Western Australia. It is an erect shrub usually with narrowly egg-shaped or narrowly triangular leaves with the narrower end toward the base, and more or less pendulous, spindle-shaped, cream to straw-coloured and dark purple flowers.

Conostephium roei is a species of flowering plant in the family Ericaceae and is endemic to the southwest of Western Australia. It is an erect shrub with egg-shaped, oblong or linear leaves with and white and purple or reddish brown flowers.

Conostephium uncinatum is a species of flowering plant in the family Ericaceae and is endemic to the southwest of Western Australia. It is an erect shrub with clustered, narrowly oblong leaves with hooked tips, and spindle-shaped flowers.

References

  1. 1 2 "Conostephium". Australian Plant Census. Retrieved 29 March 2022.
  2. "Conostephium pendulum". Friends of Queens Park bushland. 2011. Retrieved 18 January 2015.
  3. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 70. ISBN   9780958034180.
  4. Coleman, H.R. (3 October 2008). "Florabase - The Western Australian Flora" . Retrieved 10 January 2015.
  5. Johnson, Karen A.; MacQuillan, Peter B. (2011). "Comparative floral presentation and bee-pollination in two Sprengelia species (Ericaceae)". Cunninghamia. 12 (1): 45.
  6. Houston, Terry F.; Ladd, P.G. (7 February 2002). "Buzz pollination in the Epacridaceae". Australian Journal of Botany. 50 (1): 83–91. doi:10.1071/BT01020.
  7. Hislop, Michael (25 July 2013). "A taxonomic update of Conostephium (Ericaceae: Styphelioideae: Styphelieae)". Nuytsia. 23: 313–335.
  8. Cowley, K.J.; West, J.G. (July 2013). "Resources of Australian Herbaria". Council of Heads of Australasian Herbaria (CHAH). Retrieved 18 January 2015.
  9. "Conostephium". Australian Plant Census. Retrieved 29 March 2022.
  10. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. pp. 235, 236. ISBN   0646401009.