Eucalyptus kruseana
Kruse’s mallee

Myrtaceae (myrtle family)
Western Australia
Our sole Eucalyptus kruseana, a national champion, on Campus Drive at Bonair Siding. Sairus Patel, 7 May 2018
Yellow flowers, opposite leaves, and fruit capsules of Eucalyptus kruseana. Sairus Patel, 7 May 2018

Kruse’s mallee, a name embedded in literature, is also known as bookleaf mallee, but I have never heard it referred to in speech as other than kruseana. It is a popular ornamental that grows to a height of about 8 feet and bears small, light blue-green, rounded leaves that clasp the stem in pairs.

It has two botanical peculiarities among eucalypts: it is one of only three or so species that retain their juvenile foliage indefinitely, and it is the only species that has petals (admittedly they are only small triangular teeth and have to be looked for carefully).

It is frost resistant, survives with only 8 inches of rain, and is not particular about soil – or adjacent curbs, hydrants, or blacktop, as evidenced by the location of our only specimen, on Campus Drive at Bonair Siding, a national champion big tree at 16 feet high, a trunk circumference of 6 inches, and a crown spread of 23 feet (as of 2013).

E. kruseana has been used elsewhere as a small street tree.

Eucalyptus kruseana voucher. Courtesy of Prof. Matt Ritter and Robert F. Hoover Herbarium, Cal Poly State University

Related material: Eucalyptus checklist.

About this Entry: The main text of this entry is from the book Trees of Stanford and Environs, by Ronald Bracewell, published 2005. Sairus Patel added the national campion note (May 2018).