Eucalyptus macrorhyncha, commonly known as Red Gum, Red Stringybark, Cannons Stringybark or Capertee Stringybark, is a small to medium-sized tree with rough, thick fibrous and stringy, dark-brown bark.

Adult leaves are stalked, lanceolate, to 15 x 2.5 cm, concolorous, and slightly glossy green. White flowers appear in mid summer to mid autumn.

E. macrorhyncha was first recognised as a distinct species and given its name by Ferdinand von Mueller

Ferdinand von Mueller

Baron Sir Ferdinand Jacob Heinrich von Mueller, KCMG was a German-Australian physician, geographer, and most notably, a botanist.-Early life:...

. In 1867, George Bentham

George Bentham

George Bentham CMG FRS was an English botanist, characterized by Duane Isely as "the premier systematic botanist of the nineteenth century".- Formative years :...

 published a formal description in Volume 3 of his Flora Australiensis

Flora Australiensis

Flora Australiensis: a description of the plants of the Australian Territory, more commonly referred to as Flora Australiensis, and also known by its standard abbreviation Fl. Austral., is a seven-volume flora of Australia published between 1863 and 1878 by George Bentham, with the assistance of...

. Bentham's description was based on syntype

Syntype

In biological nomenclature, a syntype is a term used to indicate a specimen with a special status.In zoological nomenclature, a syntype is defined as "Each specimen of a type series from which neither a holotype nor a lectotype has been designated [Arts. 72.1.2, 73.2, 74]. The syntypes...

s collected by Mueller and Frederick Adamson

Frederick Adamson

Frederick M. Adamson was an early settler in Victoria, Australia. He was the first settler to make botanical collections in the Melbourne area; between 1840 to 1856, he sent to the Kew herbarium a series of what William Hooker described as "extensive and excellent collections". Several of his...

.

The tree occurs on ranges and tablelands of New South Wales, Australian Capital Territory and Victoria, with a small, disjunct population south-west of Clare in South Australia.