Eucalyptus annuliformis

Eucalyptus annuliformis, commonly known as the Badgerabbie mallee,[2] is a rare mallee that is endemic to a small area in the south-west of Western Australia. It has smooth, greyish bark, elliptic to lance-shaped leaves when mature, oval flower buds, white flowers and hemispherical fruit with a broad disc.

fruit showing disc

Badgerabbie mallee
Eucalyptus annuliformis flower buds

Priority One — Poorly Known Taxa (DEC)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. annuliformis
Binomial name
Eucalyptus annuliformis
Grayling & Brooker[1]

Description

Eucalyptus annuliformis is a mallee that typically grows to a height of 3 metres (10 ft) and has smooth bark and a dull green crown. The leaves on young plants are arranged alternately, broadly elliptic to egg-shaped, dull greyish green, 50–70 mm (2–3 in) long and 20–35 mm (0.8–1 in) wide. The adult leaves are elliptic to broadly lance-shaped, up to 40–65 mm (1.6–2.6 in) long and 10–22 mm (0.4–0.9 in) wide on a petiole 10–15 mm (0.39–0.59 in) long. The leaves are the same dull green on both surfaces. The flower buds are arranged in groups of seven in leaf axils on a peduncle 10–15 mm (0.4–0.6 in) long, the individual buds on a pedicel 4–6 mm (0.2–0.2 in) long. Mature buds are oval, 11–17 mm (0.43–0.67 in) long and 5–8 mm (0.20–0.31 in) wide. The operculum is conical or slightly beaked. Flowering occurs from May to September and the flowers are white. The fruit is a hemispherical capsule, 9–12 mm (0.35–0.47 in) long and 10–14 mm (0.39–0.55 in) wide on a pedicel 5–8 mm (0.2–0.3 in) long.[2][3][4]

Taxonomy and naming

Eucalyptus annuliformis was first formally described in 1992 by Peter Grayling and Ian Brooker from a specimen collected near Dandaragan and the description was published in Nuytsia.[1][3] The specific epithet (annuliformis) is said to be derived from the Latin annulus meaning "ring" and formis meaning "shape", referring to the disc of the fruit.[2] In Latin, the word for "shape" is however forma[5] and ‑formis means "‑formed".[6]

Distribution and habitat

Badgerabbie mallee is only known from Badgerabbie Hill near Dandaragan where it grows in woodland with a dense, low shrub layer.[2][3]

Conservation

Eucalyptus annuliformis is classified as "Priority One" by the Government of Western Australia Department of Parks and Wildlife,[4] meaning that it is known from only one or a few locations which are potentially at risk.[7]

See also

References
  1. "Eucalyptus annuliformis". APNI. Retrieved 28 February 2019.
  2. "Eucalyptus annuliformis". Centre for Australian National Biodiversity Research. Retrieved 28 February 2019.
  3. Grayling, Peter M.; Brooker, M. Ian (1992). "Four new species of Eucalyptus (Myrtaceae) from Western Australia". Nuytsia: 213–214. Retrieved 28 February 2019.
  4. "Eucalyptus annuliformis". FloraBase. Western Australian Government Department of Parks and Wildlife.
  5. Lewis, C.T. & Short, C. (1879). A Latin dictionary founded on Andrews' edition of Freund's Latin dictionary. Oxford: Clarendon Press
  6. Stearn, William T (1992). Botanical Latin (4 ed.). Portland, Oregon: Timber Press Inc. p. 414. ISBN 0881923214.
  7. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 28 February 2019.
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