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.

Jingymia gum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. pruiniramis
Binomial name
Eucalyptus pruiniramis

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
  1. "Eucalyptus pruiniramis". Australian Plant Census. Retrieved 6 December 2019.
  2. "Approved Conservation Advice for Eucalyptus pruiniramis (Midlands Gum)" (PDF). Australian government Department of the environment. Retrieved 6 December 2019.
  3. "Eucalyptus pruiniramis". Euclid: Centre for Australian National Biodiversity Research. Retrieved 30 May 2020.
  4. 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.
  5. "Eucalyptus pruiniramis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. "Eucalyptus pruiniramis". APNI. Retrieved 6 December 2019.
  7. Francis Aubie Sharr (2019). Western Australian Plant Names and their Meanings. Kardinya, Western Australia: Four Gables Press. p. 284. ISBN 9780958034180.
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