Darwinia apiculata

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Scarp darwinia
Darwinia apiculata.jpg
Darwinia apiculata near Gosnells
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Darwinia
Species:
D. apiculata
Binomial name
Darwinia apiculata

Darwinia apiculata, commonly known as the scarp darwinia, is a plant in the myrtle family Myrtaceae and is endemic to a small area in Western Australia. It is a rounded, densely branched, small shrub with thin red branches and scattered small leaves. The flowers are arranged in small groups on the ends of the branches, their most obvious feature being long, red, pointed bracts surrounding each flower and a longer red style with scattered hairs near its tip.

Contents

Description

Scarp darwinia is a densely branched, glabrous, rounded shrub growing to 0.4–0.5 metres (1–2 ft) high. It has thin red branches with the leaf bases having wings that extend down the stems. Its leaves have a petiole less than 0.3 millimetres (0.01 in) long, and a leaf blade 3–7 millimetres (0.1–0.3 in) long, linear in shape and triangular in cross-section. The tip of the leaves is sharply pointed. [2] [3]

The flowers are arranged in groups of 4 to 8 near the ends of the branches. The groups of flowers are surrounded by narrow egg-shaped, pointed bracts up to 15 millimetres (0.6 in) long. The bracts are green, yellowish or yellow and red. The petal lobes are about 3 millimetres (0.1 in) long and 2 millimetres (0.08 in), enclosing the stamens, staminodes and the lower part of the style. The style is red and 6–9 millimetres (0.2–0.4 in) long with scattered hairs near its tip. Flowering occurs during October or November. Fruit rarely forms but is a nut containing one or two seeds. [2] [3]

Taxonomy

The first formal description of D. apiculata was published by Neville Marchant in 1984 in Nuytsia . [4] The specific epithet (apiculata) is a Latin word meaning "small-pointed" [5] alluding to the distinctly pointed leaves. [2]

Distribution and habitat

This darwinia is currently only known from three populations in the Darling Scarp where it grows in jarrah-marri woodland in shallow, gravelly soil or sandy loam over laterite near granite boulders. [2] [3] [6]

Ecology

Scarp darwinia is killed by fire but regenerates from seed stored in the soil. Its pollination mechanism is not known but similar darwinias are pollinated by insects or birds. Some Darwinia species are susceptible to dieback disease caused by Phytophthora cinnamomi , but initial trials suggest that this species may be resistant. The main threats to the remaining populations include too-frequent fires, road and firebreak maintenance, weed invasion, illegal rubbish dumping and mining. [3]

Conservation

Darwinia apiculata is classified as "Threatened Flora (Declared Rare Flora — Extant)" by the Western Australian Government Department of Parks and Wildlife [6] and an Interim Recovery Plan has been prepared. [3] It has also been listed as "Endangered" (EN) under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) "due to the severe fragmentation of populations and continuing decline in the number of mature individuals." [3]

Related Research Articles

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

Darwinia, sometimes commonly known as mountain bells or simply bells, is a genus of about 70 species of evergreen shrubs in the family Myrtaceae, endemic to southeastern and southwestern Australia. The majority are native to southern Western Australia, but a few species occur in South Australia, New South Wales and Victoria. The genus was named in honour of Erasmus Darwin, grandfather of Charles Darwin by Edward Rudge in 1816. Most darwinias grow to a height of between 0.2 and 3 m, and many are prostrate shrubs. Most have small, simple leaves and the flowers are often grouped together, each flower with five red, white or greenish petals and ten stamens. In many species, the flowers are surrounded by large, colourful bracts, giving rise to their common names.

<i>Darwinia citriodora</i> Species of flowering plant

Darwinia citriodora, commonly known as lemon-scented darwinia or lemon scented myrtle, is a plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with oblong to lance-shaped leaves and red, yellow and orange flowers over an extended period. It is a hardy plant in well-drained soil, is often cultivated and used as a rootstock for less hardy species.

Verticordia verticordina is a flowering plant in the myrtle family, Myrtaceae and is endemic to a small area near the coast of the south-west of Western Australia. It is a small, low-growing shrub with crowded leaves and in spring, scattered pale greenish-cream and golden brown flowers. Its unusual flowers and fleshy leaves give the plant a superficial resemblance to a Darwinia.

<i>Verticordia galeata</i> Species of shrub

Verticordia galeata is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a woody shrub with thin, pointed cylinder-shaped leaves and heads of bright yellow flowers on the ends of the branches in spring.

<i>Darwinia fascicularis</i> Species of flowering plant

Darwinia fascicularis is shrub in the myrtle family and is endemic to areas near Sydney. A small shrub with aromatic foliage and white flowers, turning red as they mature. Nectar feeding birds are attracted to its flowers as a food source.

<i>Darwinia collina</i> Species of flowering plant

Darwinia collina, commonly known as the yellow mountain bell, is a plant in the myrtle family Myrtaceae. It grows as an erect shrub 0.3–1.2 metres (1–4 ft) high with crowded elliptical leaves and bright yellow flower-like inflorescences. It is endemic to a few small areas in the Stirling Range National Park, Western Australia and as a result is classified as an endangered species.

<i>Darwinia oxylepis</i> Species of flowering plant

Darwinia oxylepis, commonly known as Gillham's bell, is a plant in the myrtle family Myrtaceae. It grows as a dense, upright shrub 1.0–1.5 m (3.3–4.9 ft) high, and produces large numbers of red inflorescences prominently displayed on the ends of the branchlets in spring. It is one of a group of Darwinias including D. leiostyla, D. macrostegia, D. meeboldii, D. collina and D. squarrosa collectively known as mountain bells. The species is found in only a few seasonally moist gullies near the lower slopes of the Stirling Range National Park and nearby Porongurup National Park and is therefore classified as endangered.

Eremaea × phoenicea is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is thought to be a stabilised hybrid between two subspecies of Eremaea. It is an erect to spreading shrub with pointed, elliptic leaves and small groups of flowers, a shade of pink to red, on the ends of the branches.

<i>Verticordia humilis</i> Species of flowering plant

Verticordia humilis, commonly known as small featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small shrub with leafy branches and scattered, mostly red flowers hanging loosely near the ends of the branches.

Verticordia lehmannii is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is slender shrub with only a few branches, well-spaced, oppositely arranged leaves and small heads of pale pink to silvery flowers with a dark pink centre.

<i>Darwinia camptostylis</i> Species of flowering plant

Darwinia camptostylis is a plant in the myrtle family Myrtaceae and is endemic to New South Wales and Victoria. It is small shrub with flattened, glabrous leaves and small clusters of green to yellow flowers. There are scattered populations in coastal areas where the plants grow in heath.

<i>Darwinia capitellata</i> Species of flowering plant

Darwinia capitellata is a plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a bushy, many-branched shrub, very similar to Darwinia diosmoides but differs in the arrangement of its flowers, its more branched habit, prominent oil glands on the younger stems and its thinner, paper-like bracteoles. It was first discovered as a separate species when specimens of it were found to have a larger chromosome number than specimens of D. diosmoides.

<i>Darwinia carnea</i> Species of flowering plant

Darwinia carnea, commonly known as Mogumber bell or Narrogin bell is a plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a small shrub with narrow, keeled leaves and flowers in groups of about eight, surrounded by yellowish-green to pinkish-red bracteoles. It occurs in small, isolated populations near the towns which contribute to its common names. It is the only "bell-flowered" Darwinia to not grow in the Stirling Range National Park.

<i>Darwinia chapmaniana</i> Species of flowering plant

Darwinia chapmaniana, commonly known as Chapman's bell or Eganu bell, is a plant in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is a low, rounded, spreading shrub with greyish, hairy leaves and flowers in heads of about 14 small, tubular flowers. The heads are surrounded by long, reddish-yellow, hairy bracts.

<i>Darwinia wittwerorum</i> Species of flowering plant

Darwinia wittwerorum, commonly known as Wittwer's darwinia, is a plant in the myrtle family Myrtaceae and is endemic to a small area in Western Australia. An erect, spindly shrub with fine leaves and hanging groups of flowers surrounded by leaf-like bracts, it is one of the darwinias known as mountain bells.

<i>Darwinia acerosa</i> Species of flowering plant

Darwinia acerosa, commonly known as the fine-leaved darwinia, is a plant in the myrtle family Myrtaceae and is endemic to a small area in south-west of Western Australia. It is a densely branched, heath-like shrub with crowded, finely pointed leaves and drooping heads of forty to fifty yellowish-green flowers.

Darwinia ferricola, commonly known as the Scott River darwinia, is a plant in the myrtle family Myrtaceae and is endemic to a small area in Western Australia. It is a rounded, densely branched shrub with crowded, linear leaves mostly only on younger branches. The flowers are greenish-yellow and red, and arranged in groups on the ends of the branches, with a long white or reddish style protruding from the petal tube.

<i>Darwinia foetida</i> Species of flowering plant

Darwinia foetida, commonly known as Muchea bell, is a plant in the myrtle family Myrtaceae, and is endemic to Western Australia. It is a small upright shrub with greenish coloured nodding flowers at the apex of the stems, that have an unpleasant odour. This is a very restricted species, known from only a couple of locations.

Darwinia terricola, commonly known as the Blackwood bell, 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 small, low, sometimes prostrate shrub with small, linear leaves and small groups of flowers surrounded by reddish-green bracts and which usually lie on the ground.

<i>Darwinia whicherensis</i> Species of flowering plant

Darwinia whicherensis, commonly known as the Abba bell, is a plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a small shrub with linear leaves and bell-shaped, flower-like inflorescences containing more than twenty flowers surrounded by bracts, the largest of which are red with green edges.

References

  1. "Darwinia apiculata". Australian Plant Census. Retrieved 26 July 2022.
  2. 1 2 3 4 Marchant, Neville (1984). "A new species of Darwinia (Myrtaceae) from the Perth Region, Western Australia". Nuytsia. 5 (1): 63–66.
  3. 1 2 3 4 5 6 Cherriman, Simon; Clark, Vanessa; Willers, Nicole; Mitchell, David. "Scarp Darwinia (Darwinia apiculata) Recovery Plan" (PDF). Government of Australia Department of the Environment. Retrieved 8 September 2016.
  4. "Darwinia apiculata". APNI. Retrieved 8 September 2016.
  5. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 95.
  6. 1 2 "Darwinia apiculata". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.