Conothamnus

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Conothamnus
Conothamnus aureus (leaves flowers and fruit).jpg
Conothamnus aureus
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Subfamily: Myrtoideae
Tribe: Melaleuceae
Genus: Conothamnus
Lindl. [1]
Synonyms [1]
  • Melaleuca sect. Conothamnus(Lindl.) Baill.
  • Trichobasis Turcz.

Conothamnus is a genus of flowering plants in the family Myrtaceae and is endemic to the south-west of Western Australia. They are woody shrubs similar to melaleucas but differ in that their leaves are usually arranged in opposite pairs and the maximum number of seeds per fruit is three. (Melaleucas usually have alternately arranged leaves and there may be hundreds of very fine seeds in each woody capsule.)

Contents

C. aureus near Scaddan Conothamnus aureus (habit).jpg
C. aureus near Scaddan

Description

Plants in the genus Conothamnus are shrubs with their thinner branches covered with silky hairs. Their leaves are small, arranged in pairs and dotted with oil glands. The flowers have both male and female parts or sometimes have only fertile male parts. The flowers are arranged in small heads or spikes in the angles of leaves near the ends of the branches and are a shade of white to yellow. They have 5 sepals and 5 petals, except in Conothamnus aureus which appears to lack petals. There are many stamens, arranged in 5 bundles around the edge of the flower and are a shade of white to yellow. It is the stamens that give the flower its colour. The fruit that follows is a woody capsule. [2] [3]

Taxonomy and naming

Conothamnus was first formally described as a genus in 1839 by John Lindley in A Sketch of the Vegetation of the Swan River Colony , and the first species he described (the type species) was Conothamnus trinervis . [4] He noted: [5]

...[it] bears to Melaleuca the same relation as Beaufortia to Calothamnus ; that is to say, it differs in having the fruit only three-seeded instead of many-seeded; to this plant, which is more curious than beautiful, the name of Conothamnus trinervis may be given.

The name Conothamnus means "cone-bush", referring to the shape of the flower heads. [6]

Distribution and habitat

Conothamnus species are restricted to near-coastal areas of the south-west in the Avon Wheatbelt, Esperance Plains, Jarrah Forest, Warren, Geraldton Sandplains, Mallee and Swan Coastal Plain biogeographic regions. [2] They grow in sand or sandy loam in gravelly areas, swampy plains, flats and sand dunes. [7]

Three species of Conothamnus are recognised by the Western Australian Herbarium:

Related Research Articles

<i>Beaufortia</i> (plant) Genus of flowering plants

Beaufortia is a genus of woody shrubs and small trees in the family Myrtaceae and is endemic to Southwest Australia. The genus Beaufortia is closely related to Melaleuca, Calothamnus, Regelia and several others, differing mainly in the way the anthers are attached to the stalks of the stamens, and in the way they open to release their pollen. Beaufortia anthers are attached at one end and open by splitting at the other.

<i>Melaleuca radula</i> Species of flowering plant

Melaleuca radula, commonly known as graceful honey-myrtle, is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an open, spreading shrub with narrow leaves, profuse pink or purple flowers in late winter and smooth, almost spherical fruits.

<i>Melaleuca preissiana</i> Species of tree

Melaleuca preissiana, commonly known as stout paperbark, modong or moonah, is a plant in the myrtle family, Myrtaceae and is endemic to coastal areas of southwest Australia. It is a shrub or small tree with papery bark, small leaves and spikes of usually white flowers. It occurs chiefly in areas that are seasonally wet.

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

Calothamnus is a genus of shrubs in the family Myrtaceae and is endemic to the south-west of Western Australia. The common names one-sided bottlebrush or claw flower are given to some species due to their having the flowers clustered on one side of the stem or because of the claw-like appearance of their flowers. Calothamnus species are generally medium to tall woody shrubs with crowded leaves. In most species the leaves are crowded and linear in shape, and the flowers are usually arranged in dense clusters. The petals are small and fall off the flower soon after it opens but the stamens are long, numerous and usually bright red.

<i>Melaleuca huegelii</i> Species of flowering plant

Melaleuca huegelii, commonly known as chenille honey-myrtle, is a plant in the myrtle family, Myrtaceae and is endemic to the south-west coastal areas of Western Australia. It has small, almost scale-like leaves and flower spikes sometimes more than 100 millimetres (4 in) long on the ends many of its branches.

<i>Eremaea</i> (plant) Genus of flowering plants

Eremaea is a genus of woody shrubs and small trees in the family Myrtaceae and is endemic to the south-west of Western Australia. Little study of the genus as a whole had been undertaken until Roger Hnatiuk researched Eremaea and published a paper in 1993, A revision of the genus Eremaea (Myrtaceae) in Nuytsia. The first species to be described was Eremaea pauciflora in 1837 and by 1964, the number of species known had increased to 12. Hnatiuk recognised 16 species, 5 subspecies and a number of varieties.

<i>Melaleuca trichophylla</i> Species of shrub

Melaleuca trichophylla is a shrub in the myrtle family, Myrtaceae, endemic to the south-west of Western Australia. Its pink or purple flowers appear from August to December in its native range. It has long been cultivated.

<i>Melaleuca rhaphiophylla</i> Species of flowering plant

Melaleuca rhaphiophylla, commonly known as swamp paperbark is a plant in the myrtle family, Myrtaceae and is endemic to the south west of Western Australia. It has narrow, needle-like leaves and profuse spikes of white or yellowish flowers at variable times throughout the year. As its common name suggests, it is usually found in salt marshes, or swamps or along watercourses and occurs over wide areas of the south-west.

<i>Melaleuca viminea</i> Species of flowering plant

Melaleuca viminea, commonly known as mohan is a plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is variable in size and form from a densely branched, small shrub to a small tree. It has become naturalised locally in southern Victoria.

<i>Melaleuca dempta</i> Species of shrub

Melaleuca dempta is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect shrub resembling Melaleuca calycina with its heads of white flowers and egg-shaped to heart-shaped leaves. It was formerly considered a subspecies of Melaleuca calycina subsp. dempta but it lacks the star-like fruits of that species and its leaves have a blunt rather than a pointed tip.

<i>Melaleuca leuropoma</i> Species of flowering plant

Melaleuca leuropoma is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small to medium-sized shrub which flowers over an extended period with flower colour varying from purple to yellow or white. The glossy, often brown petals covering the flower buds are also an unusual characteristic of this species.

<i>Melaleuca osullivanii</i> Species of plant

Melaleuca osullivanii is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It was first formally described in 2004 after a review of the broombush group, Melaleuca uncinata. It differs from others in the group by having leaves that are fine and circular in cross section. The closest other broombrush is Melaleuca hamata whose leaves are 0.8–1.6 mm (0.03–0.06 in) in diameter compared to 0.7–0.9 mm (0.03–0.04 in) for this species.

<i>Melaleuca ciliosa</i> Species of shrub

Melaleuca ciliosa is a small shrub in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It has bright or pale yellow flowers, an unusual calyx and leaves that are slightly hairy, especially around the edges.

<i>Melaleuca conothamnoides</i> Species of shrub

Melaleuca conothamnoides is a shrub in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is distinguished by its relatively large leaves, prominent oil glands and unusual bracts covering the flower buds before they open.

<i>Melaleuca incana</i> Species of flowering plant

Melaleuca incana, commonly known as grey honey-myrtle, is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia and is naturalised in the south of Victoria in Australia. It is commonly grown as a garden plant and produces large numbers of white or creamy yellow flowers, sometimes highly scented, in spring.

<i>Melaleuca microphylla</i> Species of flowering plant

Melaleuca microphylla is a plant in the myrtle family, Myrtaceae and is endemic to a small area in the south-west of Western Australia. It is a bushy shrub with small, crowded leaves and bears a close resemblance to the commonly cultivated Melaleuca ericifolia of the eastern states.

<i>Melaleuca parviceps</i> Species of shrub

Melaleuca parviceps, commonly known as rough honey-myrtle is a shrub in the myrtle family, Myrtaceae, and is endemic to the south-west of Western Australia. It is a shrub with varying shades of pink or purple flowers, the stamens tipped with yellow anthers. In describing it, John Lindley noted: "every twig ... is terminated by hemispherical heads of brilliant pink". It is similar to Melaleuca manglesii and Melaleuca seriata.

<i>Melaleuca seriata</i> Species of shrub

Melaleuca seriata is a shrub in the myrtle family, Myrtaceae, and is endemic to the south-west of Western Australia. In describing it, John Lindley wrote "Melaleuca seriata, parviceps, and trichophylla, are bushes, every twig of which is terminated by hemispherical heads of a brilliant pink." It is very similar to Melaleuca parviceps.

<i>Conothamnus aureus</i> Species of flowering plant

Conothamnus aureus is a member of the family Myrtaceae and is endemic to Western Australia. It is a spindly, straggly shrub with rigid, blunt leaves and spherical heads of golden yellow flowers resembling those of wattles.

<i>Conothamnus trinervis</i> Species of flowering plant

Conothamnus trinervis is a plant species in the family Myrtaceae endemic to Western Australia. It is a shrub with thick, stiff stems, leaves with a sharp point on the tip and heads of usually cream-coloured flowers.

References

  1. 1 2 "Conothamnus". Australian Plant Census. Retrieved 30 April 2023.
  2. 1 2 "Conothamnus Lindl.". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. Kubitzki, Klaus (1990). The families and genera of vascular plants. Berlin: Springer. p. 237. ISBN   9783642143960 . Retrieved 10 August 2015.
  4. "Conothamnus Lindl.". APNI. Retrieved 10 August 2015.
  5. Lindley, John (1839). A Sketch of the Vegetation of the Swan River Colony (Appendix IX). Piccadilly, London: James Ridgway. Retrieved 10 August 2015.
  6. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 70. ISBN   9780958034180.
  7. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 356. ISBN   0646402439.
  8. "Conothamnus aureus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  9. "Conothamnus neglectus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  10. "Conothamnus trinervis". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.