Eucalyptus sweedmaniana is a sprawling to prostrate mallee that is endemic to a small area in the Cape Arid National Park in Western Australia. It has smooth, silvery grey bark, broadly lance-shaped, glossy green adult leaves, single red, pendulous flower buds in leaf axils, pink flowers and prominently winged fruit.
| Sweedman's sprawling mallee | |
|---|---|
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| Eucalyptus sweedmaniana at Kings Park | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. sweedmaniana
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| Binomial name | |
| Eucalyptus sweedmaniana | |
Description
editEucalyptus sweedmaniana is a sprawling or prostrate mallee that grows to a height of about 1 m (3 ft 3 in), a width of 5 m (16 ft) and forms a lignotuber. It has smooth, shiny silvery grey bark that fades to dull grey. Young plants have reddish green, lance-shaped to elliptical leaves that are 42–63 mm (1.7–2.5 in) long and 19–25 mm (0.75–0.98 in) wide on a petiole 8–15 mm (0.31–0.59 in) long. Adult leaves are the same shade of glossy green on both sides, broadly lance-shaped, 165–263 mm (6.5–10.4 in) long and 45–67 mm (1.8–2.6 in) wide on thick, flattened petiole 38–48 mm (1.5–1.9 in) long. The flower buds are arranged singly in leaf axils on a down-curved, winged peduncle. The mature flower buds are red, square in cross section with prominent wings, with a red, pyramid-shaped operculum. Flowering has been observed from November to February and the flowers are pink. The fruit is a woody, cube-shaped to oblong capsule that is square in cross-section, 34–38 mm (1.3–1.5 in) long and 30–41 mm (1.2–1.6 in) wide with prominent wings and the valves enclosed below the rim.[2][3]
Taxonomy
editEucalyptus sweedmaniana was first formally described in 2009 by Stephen Hopper and Nathan K. McQuoid and the description was published in Australian Systematic Botany from a specimen in the Cape Arid National Park in 2006.[2][4] The specific epithet (sweedmaniana) honours Luke Sweedman, a former curator of the Western Australian Seed Technology Centre, Western Australian Botanic Garden, Kings Park and Botanic Garden.[2]
Distribution
editThis mallee is only known from the lower coastal slopes of Mount Arid where it is exposed to significant salt spray.[2][5]
Conservation
editEucalyptus sweedmaniana is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife[5] meaning that it is poorly known and from only one or a few locations.[6]
See also
editReferences
edit- ^ "Eucalyptus sweedmaniana". Australian Plant Census. Retrieved 4 January 2020.
- ^ a b c d Hopper, Stephen D.; McQuoid, Nathan K. (2009). "Two new rare species and a new hybrid in Eucalyptus series Tetrapterae (Myrtaceae) from southern coastal Western Australia". Australian Systematic Botany. 22 (3): 185–187. doi:10.1071/SB06034.
- ^ "Eucalyptus sweedmaniana". Centre for Australian National Biodiversity Research. Retrieved 29 May 2020.
- ^ "Eucalyptus sweedmaniana". APNI. Retrieved 4 January 2020.
- ^ a b "Eucalyptus sweedmaniana". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 4 January 2020.