Eucalyptus pruiniramis
| Jingymia gum | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. pruiniramis
|
| Binomial name | |
| Eucalyptus pruiniramis | |
Eucalyptus pruiniramis, commonly known as Jingymia gum or midlands gum[2] is a species of mallee or tree that is endemic to a small area of Western Australia. It usually has rough bark on the lower half of the trunk, smooth bark above, dull green, lance-shaped adult leaves, flower buds in groups of between seven and eleven, white flowers and cylindrical to cup-shaped fruit.
Description
Eucalyptus pruiniramis is a mallee, sometimes a small straggly tree, that typically grows to a height of 2.5–7 m (8 ft 2 in – 23 ft 0 in) and forms a lignotuber. It has smooth greyish or blackish bark, usually with rough fibrous bark on the lower half of the trunk. Young plants have stems that are square in cross-section and leaves that are greyish green, broadly egg-shaped to round, 45–105 mm (1.8–4.1 in) long and 40–65 mm (1.6–2.6 in) wide. Adult leaves are the same shade of dull green on both sides, lance-shaped, 85–125 mm (3.3–4.9 in) long and 15–33 mm (0.59–1.30 in) wide, tapering to a petiole 15–30 mm (0.59–1.18 in) long. The flower buds are arranged in leaf axils in groups of seven, nine or eleven on a flattened, unbranched peduncle 8–20 mm (0.31–0.79 in) long, the individual buds on pedicels 2–5 mm (0.079–0.197 in) long. Mature buds are broadly spindle-shaped to oval, 11–16 mm (0.43–0.63 in) long and 5–7 mm (0.20–0.28 in) wide with a conical operculum. Flowering occurs in summer and the flowers are white. The fruit is a woody, cylindrical to cup-shaped capsule 8–12 mm (0.31–0.47 in) long and 8–10 mm (0.31–0.39 in) wide with the valves near rim level.[2][3][4][5]
Taxonomy
Eucalyptus pruiniramis was first formally described in 1992 by Lawrie Johnson and Ken Hill in the journal Telopea.[4][6] The specific epithet (pruiniramis) is from Latin, meaning "rime" or "hoar-frost" and "-of a branch", referring to the white, waxy covering on the branches.[3][7]
Distribution and habitat
Jingymia mallee grows in low mallee woodland on rocky hillsides between Mogumber and Arrino. It is only known from nine populations with a total of about 58 plants and only one population is in a reserve.
Conservation status
This mallee is listed as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "Threatened Flora (Declared Rare Flora — Extant)" by the Department of Environment and Conservation (Western Australia).[5] The main threats to the species are road and fence maintenance, gravel extraction, grazing and weed infestation.[2][5]
See also
References
- ^ "Eucalyptus pruiniramis". Australian Plant Census. Retrieved 6 December 2019.
- ^ a b c "Approved Conservation Advice for Eucalyptus pruiniramis (Midlands Gum)" (PDF). Australian government Department of the environment. Retrieved 6 December 2019.
- ^ a b "Eucalyptus pruiniramis". Euclid: Centre for Australian National Biodiversity Research. Retrieved 30 May 2020.
- ^ a b Johnson, Lawrence A.S.; Hill, Kenneth D. (1992). "Systematic studies in the eucalypts - 5. New taxa and combinations in Eucalyptus (Myrtaceae) in Western Australia". Telopea. 4 (4): 563.
- ^ a b c "Eucalyptus pruiniramis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Eucalyptus pruiniramis". APNI. Retrieved 6 December 2019.
- ^ Francis Aubie Sharr (2019). Western Australian Plant Names and their Meanings. Kardinya, Western Australia: Four Gables Press. p. 284. ISBN 9780958034180.