Eucalyptus preissiana
Eucalyptus preissiana, commonly known as bell-fruited mallee, is a species of small tree or shrub that occurs in an area between Albany and Esperance in Western Australia. It has a spreading habit, smooth bark, elliptical to egg-shaped or oblong leaves, flower buds in groups of three, yellow flowers and cup-shaped, conical or bell-shaped fruit. Description
Eucalyptus preissiana is a mallee that typically grows to a height of  with a sprawling habit, and forms a lignotuber. It has smooth, greyish and brown bark. Young plants and coppice regrowth have stems that are square in cross-section and elliptical to egg-shaped leaves that are the greyish green,  long,  wide and arranged in opposite pairs. Adult leaves are sometimes arranged alternately, the same shade of dull greyish green on both sides, elliptical to egg-shaped or oblong,  long and  wide on a petiole  long. The flower buds are arranged in leaf axils on a flattened, unbranched peduncle  long, the individual buds on pedicels  long. Mature buds are oval,  long and  wide with a conical to rounded operculum. Flowering occurs from September to November and the flowers are yellow. The fruit is a woody, cup-shaped, conical or bell-shaped capsule  long and  wide with lobes between the valves. Taxonomy and naming
Eucalyptus preissiana was first formally described in 1844 by the Johannes Conrad Schauer and the description was published in Lehmann's book Plantae Preissianae. The specific epithet honours Ludwig Preiss who collected the type specimen near Cape Riche in 1840. In 1995 Ian Brooker and Andrew Slee described two subspecies and the names have been accepted by the Australian Plant Census:

 Eucalyptus preissiana subsp. lobata Brooker & Slee differs from subspecies preissiana in having large lobes between the valves of the fruit;
 Eucalyptus preissiana Schauer subsp. preissiana has fruit that lack lobes or have small lobes below the rim of the fruit. Distribution
Bell-fruited mallee is found in coastal and sub-coastal areas among limestone and laterite and grows in gravelly sandy-clay soils. It occurs in coastal and near-coastal areas from the Stirling Range to the Fitzgerald River National Park and almost to Esperance to the east. Subspecies lobata only occurs in coastal areas in a few places between Esperance and Hopetoun. Conservation status
Subspecies preissiana is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife, but subspecies lobata is classified as "Priority Four" by the Government of Western Australia Department of Parks and Wildlife, meaning that is rare or near threatened. Use in horticulture
Bell-fruited mallee can be cultivated in temperate areas of Australia but performs poorly in tropical environments. It is propagated from seeds and germinates easily. It prefers a position in full sun and in well-drained soils. See also
List of Eucalyptus species

References

Eucalypts of Western Australia
preissiana
Myrtales of Australia
Mallees (habit)
Plants described in 1844
Taxa named by Johannes Conrad Schauer