Eucalyptus kruseana

The mallee has a straggly habit with multiple branches and typically grows to a height of 2.5 to 4 metres (8 to 13 ft)[3] and a width of 2 to 3.5 metres (7 to 11 ft).[4] In its native area it blooms in the winter and early spring, between June and September, producing inflorescences with yellow flowers.[3] The leaves have a rounded shape, are silver-blue leaves in colour and are crowded along branches.[2] It form buds in clusters from which the flowers form.[5]

The bark is smooth, grey to pinkish grey. Adult leaves remain in the juvenile phase and are ovate, sessile, about 2.2 centimetres (0.9 in) in length and width, concolorous, dull grey. Yellow flowers appear in winter to mid spring.[6] The leaves are aromatic when crushed and arranged opposite to each other.[7]

Like most mallees the small tree forms multiple stems from a lignotuber, but in cultivation E . kruseana often forms a single stem. The bark of the main stem is minni-ritchi style that is a reddish brown colour that forms longitudinal fissures and rolls back from the edges so the pale green to grey inner bark.[5] There are oil glands present in the branchlet pith.[7]

Eucalyptus kruseana was first formally described by the botanist Ferdinand von Mueller in 1895 in the Australasian Journal of Pharmacy.[8]

In 1910, Joseph Maiden described Eucalyptus morrisonii in the Journal of the Natural History and Science Society of Western Australia,[9] but in 1920 accepted that it was the same as E. kruseana and that E. morrisonii is therefore a synonym.[10]

The specific epithet honours John Kruse, a German born pharmacist, who worked in Melbourne.[11]

It has a restricted distribution on granite hills and among granite outcrops east and south east of Kalgoorlie, from Cardunia Rock north of Karonie to Binyarinyinna Rock and east of Higginsville, usually found on or near granite rock in south eastern Western Australia where it grows in sandy-loam soils.

Book-leaf mallee is sold commercially as tube stock or in seed form. It is drought and frost tolerant and prefers a full sun position. Sold as an ornamental for small or large gardens,[4] it is used for privacy screening, for shade, for hedging or as a feature. Florists use the foliage and flowers in arrangements.[2] It can withstand hard pruning to give the plant a better shape.[5]

• List of Eucalyptus species