Hypocalymma tenuatum

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Hypocalymma tenuatum
Status DECF P2.svg
Priority Two — Poorly Known Taxa (DEC)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Hypocalymma
Species:
H. tenuatum
Binomial name
Hypocalymma tenuatum

Hypocalymma tenuatum, commonly known as Lesueur myrtle, [2] is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the a restricted area in the south-west of Western Australia. It is a low, spreading shrub, with linear leaves, and white or pale yellow flowers with 20 to 25 stamens.

Contents

Description

Hypocalymma tenuatum is a low, spreading shrub that typically grows to a height of 20–35 cm (7.9–13.8 in). Its leaves are linear in outline, 6–9 mm (0.24–0.35 in) long, 0.5–1.3 mm (0.020–0.051 in) wide and 0.4–0.7 mm (0.016–0.028 in) thick. The lower side of the leaves is deeply convex and grooved, with star-like oil glands. The flowers are 5–6 mm (0.20–0.24 in) in diameter, and often arranged in pairs with bracteoles 0.6–1.5 mm (0.024–0.059 in) long at the base. The floral tube is about 1.0–1.3 mm (0.039–0.051 in) long and 2.5 mm (0.098 in) wide and the sepals are egg-shaped, 0.8–1.2 mm (0.031–0.047 in) long and 1.5–2.0 mm (0.059–0.079 in) wide. The petals are white or pale yellow, 2.0–2.5 mm (0.079–0.098 in) long and there are 20 to 25 white or pale yellow stamens, the longest filaments 3.0–3.8 mm (0.12–0.15 in) long. Flowering mainly occurs from August to October, and the fruit is a capsule 2.3–2.7 mm (0.091–0.106 in) long and 2.0–2.5 mm (0.079–0.098 in) in diameter. [2] [3] [4]

Taxonomy

Hypocalymma tenuatum was first formally described in 2003 by Arne Strid and Greg Keighery in the Nordic Journal of Botany from specimens collected on Mount Lesueur in 1980. [3] [5] The specific epithet (tenuatum) means 'completely slender', referring to the drawn-out branches. [6]

Distribution and habitat

This species of Hypocalymma is found with laterite in wandoo woodland or on sandstone outcrops between the Lesueur National Park and Warradarge in the Geraldton Sandplains bioregion of south-western Western Australia. [2] [4]

Conservation status

Hypocalymma tenuatum is listed as "Priority Two" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [2] meaning that it is poorly known and from one or a few locations. [7]

Related Research Articles

<i>Hypocalymma robustum</i> Species of flowering plant

Hypocalymma robustum, commonly known as Swan River myrtle, is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is an erect, multistemmed shrub or shrublet with linear to narrowly oblong leaves and pink flowers arranged in pairs in leaf axils, with 35 to 60 stamens.

<i>Hypocalymma strictum</i> Species of flowering plant

Hypocalymma strictum is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is an erect shrub with linear leaves, triangular in cross section, and deep pink flowers with 30 to 50 stamens.

Hypocalymma connatum is a species of flowering in the myrtle family Myrtaceae, and is endemic to Western Australia. It is a shrub, with narrowly egg-shaped leaves, probably white flowers, but has not been collected since 1935.

<i>Hypocalymma cordifolium</i> Species of flowering plant

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Hypocalymma ericifolium is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is an erect shrublet with linear leaves that are more or less triangular in cross section, and bright yellow flowers arranged in pairs in leaf axils with 30 to 50 stamens.

Hypocalymma gardneri is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is a widely spreading subshrub, with linear leaves and yellow flowers arranged in pairs in leaf axils, with 80 to 105 stamens in several rows.

<i>Hypocalymma hirsutum</i> Species of flowering plant

Hypocalymma hirsutum is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is a low-growing shrub, with leaves arranged in opposite pairs, narrowly egg-shaped with the narrower end towards the base, and bright yellow flowers arranged singly in leaf axils, with usually 80 to 110 stamens in several rows.

<i>Hypocalymma jessicae</i> Species of flowering plant

Hypocalymma jessicae, commonly known as barrens myrtle, is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is an erect, spreading shrub, with narrowly egg-shaped leaves with the narrower end towards the base, and pale to bright pink flowers mostly arranged in pairs in leaf axils, with 35 to 100 stamens in several rows.

Hypocalymma longifolium, commonly known as long-leaved myrtle, is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted part of Western Australia. It is an open shrub with linear leaves, and white or cream-coloured flowers arranged in pairs in leaf axils, with 40 to 50 stamens in several rows.

Hypocalymma melaleucoides, commonly known as Fitzgerald myrtle, is a member of the family Myrtaceae and is endemic to the Fitzgerald River National Park in the south of Western Australia. It is a spreading shrub with linear leaves that are round in cross-section, and bright pink flowers, with 35 to 55 stamens in several rows.

<i>Hypocalymma myrtifolium</i> Species of flowering plant

Hypocalymma myrtifolium is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted area in the south west of Western Australia. It is an erect shrub with egg-shaped to elliptic leaves and white or cream-coloured flowers with 30 to 50 stamens in several rows.

Hypocalymma minus is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia. It is a low-growing shrub, with heart-shaped leaves arranged in opposite pairs, white or pale pink flowers usually arranged singly in leaf axils with 10 to 20 stamens in one or two rows.

<i>Hypocalymma phillipsii</i> Species of flowering plant

Hypocalymma phillipsii is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted part of Western Australia. It is an erect, spreading shrub with elliptic to very broadly egg-shaped leaves, and white flowers arranged singly or in pairs in leaf axils, with 30 to 50 stamens in several rows.

<i>Hypocalymma puniceum</i> Species of flowering plant

Hypocalymma puniceum, commonly known as large myrtle, is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is a spreading shrub with linear leaves and bright pink flowers arranged singly in leaf axils, with 35 to 55 stamens in several rows.

<i>Hypocalymma scariosum</i> Species of flowering plant

Hypocalymma scariosum is a species of flowering in the myrtle family Myrtaceae, and is endemic to the south of Western Australia. It is an erect, apparently short-lived, glabrous shrublet, with grooved linear leaves, and cream-coloured or sometimes yellow flowers with 12 to 20 stamens.

<i>Hypocalymma serrulatum</i> Species of flowering plant

Hypocalymma serrulatum commonly known as early myrtle, is a species of flowering in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is an erect shrub, with linear leaves, and white or pink flowers with 40 to 55 stamens.

<i>Hypocalymma speciosum</i> Species of flowering plant

Hypocalymma speciosum is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the Stirling Range in southern Western Australia. It is a bushy shrub with heart-shaped, egg-shaped or circular leaves and deep pink-purple flowers with 25 to 50 stamens in several rows.

<i>Hypocalymma sylvestre</i> Species of flowering plant

Hypocalymma sylvestre commonly known as Chittering myrtle, is a species of flowering in the myrtle family Myrtaceae, and is endemic to a restricted part of the south-west of Western Australia. It is a spreading shrub, with broadly egg-shaped to heart-shaped leaves, and pale yellow flowers with 100 to 200 stamens in several rows.

<i>Hypocalymma tetrapterum</i> Species of flowering plant

Hypocalymma tetrapterum, commonly known as papillose myrtle, is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the a restricted area in the south-west of Western Australia. It is a shrub, with narrowly egg-shaped leaves with the narrower end towards the base, and white yellow flowers with 20 to 35 stamens in several rows.

<i>Hypocalymma <span style="font-style:normal;">×</span> linifolium</i> Species of flowering plant

Hypocalymma x linifolium is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted area in the south west of Western Australia. It is low, spreading shrub with narrowly egg-shaped to almost linear leaves and bright yellow flowers with 22 to 41 stamens in several rows.

References

  1. ↑ "Hypocalymma tenuatum". Australian Plant Census. Retrieved 8 November 2024.
  2. 1 2 3 4 "Hypocalymma tenuatum". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. 1 2 Strid, Arne; Keighery, Gregory J. (2003). "A taxonomic review of the genus Hypocalymma". Nordic Journal of Botany. 22 (5): 545–546.
  4. 1 2 Keighery, Gregory J.; Rye, Barbara L.; Tauss, Catherine (2023). "Update to the taxonomy of Hypocalymma sect. Hypocalymma (Myrtaceae: Chamelaucieae), including hybrids and new species". Telopea. 34: 49–50. Retrieved 8 November 2024.
  5. ↑ "Hypocalymma tenuatum". Australian Plant Name Index. Retrieved 8 November 2024.
  6. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 321. ISBN   9780958034180.
  7. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 8 November 2024.
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