Jacksonia arnhemica

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Jacksonia arnhemica
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Jacksonia
Species:
J. arnhemica
Binomial name
Jacksonia arnhemica

Jacksonia arnhemica is a species of flowering plant in the family Fabaceae and is endemic to the Northern Territory. It is an erect, densely branched, delicate shrub, the end branches sharply-pointed phylloclades, with yellow flowers, and woody, hairy pods.

Contents

Description

Jacksonia arnhemica is an erect, densely branched, delicate shrub that typically grows up to 1–2.5 m (3 ft 3 in – 8 ft 2 in) high and 1–2 m (3 ft 3 in – 6 ft 7 in) wide. Its end-branches are sharply pointed phylloclades, 0.5–0.6 mm (0.020–0.024 in) wide at their mid-point. The leaves are reduced to sharply-pointed, mid- to dark brown, egg-shaped scales, 0.5–1.2 mm (0.020–0.047 in) long and 0.3–0.7 mm (0.012–0.028 in) wide. The flowers are scattered along branches on pedicels 0.7–2.2 mm (0.028–0.087 in) long. There are egg-shaped bracteoles 0.6–1.3 mm (0.024–0.051 in) long and 0.4–0.6 mm (0.016–0.024 in) wide on the pedicels. The floral tube is 1.1–1.3 mm (0.043–0.051 in) long and the sepals are membranous, the lower lobes longer than the upper lobes, and fused at the base. The petals are yellow, the standard petal 4.7–5.5 mm (0.19–0.22 in) long, the wings 4.4–4.5 mm (0.17–0.18 in) long, and the keel 3.5–3.8 mm (0.14–0.15 in) long. The stamens have pink filaments 2.4–5.7 mm (0.094–0.224 in) long. Flowering occurs from March to October, and the fruit is a woody pod, 4.2–5.3 mm (0.17–0.21 in) long and 2.3–3.0 mm (0.091–0.118 in) wide, with white hairs pressed against the surface. [2]

Taxonomy

Jacksonia arnhemica was first formally described in 2007 by Jennifer Anne Chappill in Australian Systematic Botany from specimens collected near Malay Bay in 1987. [2] [3]

Distribution and habitat

This species of Jacksonia grows in woodland in sand over sandstone in the north of the Northern Territory and offshore islands in the Arnhem Coast, Arnhem Plateau, Central Arnhem and Gulf Fall and Uplands bioregions of the Northern Territory. [2] [4]

Conservation status

Jacksonia arnhemica is listed as "least concern" under the Territory Parks and Wildlife Conservation Act. [4]

Related Research Articles

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Jacksonia sternbergiana, commonly known as stinkwood, is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. The Noongar peoples know the plant as kabbur, koorpa or mondurn. It is an erect or weeping shrub or tree with dull green branches, straight, sharply-pointed side branches, its leaves reduced to scales, yellowish-orange flowers, and woody, hairy pods.

<i>Jacksonia aculeata</i> Species of legume

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<i>Jacksonia alata</i> Species of legume

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<i>Jacksonia angulata</i> Species of legume

Jacksonia angulata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a tufted, spreading to prostrate shrub often with zig-zagged branches, sharply-pointed side branches or phylloclades, leaves reduced to broadly egg-shaped scales, yellow-orange to orange flowers with a red "eye", and woody, densely hairy pods.

<i>Jacksonia arenicola</i> Species of legume

Jacksonia arenicola is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, broom-like shrub with densely hairy, sharply-pointed phylloclades, yellow-orange flowers with red markings, and woody pods that are hairy at first, later glabrous.

Jacksonia calycina is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is an erect or straggling shrub with sharply pointed end branches, yellow-orange flowers with red and yellow markings, and woody, hairy pods.

Jacksonia chappilliae is a species of flowering plant in the family Fabaceae and is endemic to a restricted area of northern New South Wales. It is an erect shrub with its end-branches sharply-pointed phylloclades, and yellow-orange flowers with red markings scattered along the branches.

<i>Jacksonia compressa</i> Species of legume

Jacksonia compressa is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is an erect, bushy shrub with sharply pointed end branches, yellow-orange flowers with red markings, and woody, hairy pods.

<i>Jacksonia condensata</i> Species of legume

Jacksonia condensata is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is a slender, ascending to erect shrub with sharply-pointed phylloclades, the leaves reduced to scales, yellow to yellow-orange flowers, and woody, hairy pods.

<i>Jacksonia cupulifera</i> Species of legume

Jacksonia cupulifera is a species of flowering plant in the family Fabaceae and is endemic to the north-west of Western Australia. It is an erect shrub or weeping tree with sharply-pointed phylloclades, its leaves reduced to scales and yellow-orange flowers scattered along the branches.

<i>Jacksonia debilis</i> Species of legume

Jacksonia debilis is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is a spreading to prostrate shrub with curved phylloclades, yellow-orange flowers with red markings, and woody, hairy pods.

<i>Jacksonia dilatata</i> Species of legume

Jacksonia dilatata is a species of flowering plant in the family Fabaceae and is endemic to the northern Australia. It is usually an erect shrub or small tree with narrowly egg-shaped phylloclades, the leaves reduced scales, and yellow flowers in clusters of up to 20 at the ends of the phylloclades.

Jacksonia divisa is a species of flowering plant in the family Fabaceae and is endemic to a restricted part of Kakadu National Park. It is an erect, densely branching shrub, its end branches flattened, hairy, leaf-like phylloclades, its leaves reduced to broadly lance-shaped scales, with yellow flowers, and woody, hairy pods.

Jacksonia effusa is a species of flowering plant in the family Fabaceae and is endemic to a restricted area near Nitmiluk (Katherine) Gorge. It is a sprawling shrub, its end branches sharply-pointed phylloclades, its leaves reduced to sharply-pointed, narrowly egg-shaped scales, its flowers pale yellow, and its fruit, woody, hairy pods.

Jacksonia eremodendron is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a straggling shrub to small tree, the end branches egg-shaped, elliptic or oblong phylloclades with sharply-pointed teeth on the edges, the flowers yellow-orange with red markings and attached to teeth on phylloclades, and woody, densely-hairy pods.

Jacksonia flexuosa is a species of flowering plant in the family Fabaceae and is endemic to a restricted part of the Northern Territory. It is an erect, densely branching shrub, the end branches short, zig-zagged and scattered along the branches and densely hairy, the leaves reduced to sharply-pointed scale leaves, the flowers yellow, and the fruit is a woody, densely hairy pod.

Jacksonia foliosa is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is a low-lying or erect shrub with sharply pointed end branches, yellow-orange flowers with red markings, and woody, hairy pods.

<i>Jacksonia forrestii</i> Species of legume

Jacksonia forrestii, commonly known as broom bush, is a species of flowering plant in the family Fabaceae and is endemic to the north-west of Australia. It is an erect, slender, weeping shrub or tree with sharply pointed phylloclades, yellow to yellow-orange flowers without markings, and woody, hairy pods.

<i>Jacksonia gracillima</i> Species of legume

Jacksonia gracillima is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a low, spreading, compact shrub with greyish-green branches, yellow to yellow-orange or orange-red flowers with red markings, and woody, densely-hairy pods.

<i>Jacksonia grevilleoides</i> Species of legume

Jacksonia grevilleoides is a species of flowering plant in the family Fabaceae and is endemic to the south west of Western Australia. It is a prostrate or erect shrub with variably-shaped phylloclades, yellow-orange flowers and woody, densely hairy pods.

References

  1. ↑ "Jacksonia arnhemica". Australian Plant Census. Retrieved 21 August 2024.
  2. 1 2 3 Chappill, Jennifer A.; Wilkins, Carolyn F.; Crisp, Michael D. (2007). "Taxonomic revision of Jacksonia (Leguminosae: Mirbelieae)". Australian Systematic Botany. 20 (6): 526.
  3. ↑ "Jacksonia arnhemica". Australian Plant Name Index. Retrieved 21 July 2024.
  4. 1 2 "Jacksonia arnhemica". Northern Territory. Retrieved 21 August 2024.
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