Myrtaceae. He did not give a reason for the specific epithet (calophylla), however Ferdinand von Mueller noted in 1879 that Brown "bestowed the specific name on this tree seemingly for a double reason, because the foliage is more beautiful than that of many other Eucalypts, and also because the venation of the leaves reminds of that of the tropical genus Calophyllum in the plants-order of Guttiferae." The first formal description of E. calophylla was published in 1841 by John Lindley in Edwards Botanical Register. Seeds of the plant had been collected at "Port Augusta" by "Mrs. Molloy" and sent to "Capt. Jas. Mangles, R.N." who was later a seed merchant. Mueller placed the species with a series of "bloodwoods" in 1884, based on characteristics of the bark. Joseph Maiden's 1920 book, A Critical Revision of the Genus Eucalyptus, supported this arrangement. In 1995 Ken Hill and Lawrie Johnson changed the name to Corymbia calophylla. In 2009, Carlos Parra-O and colleagues published a combined analysis of nuclear rDNA (ETS + ITS) and morphological characters published to clarify relationships within the genus Corymbia. C. calophylla was found to form a natural group with two other Western Australian species C. ficifolia and C. haematoxylon. They classified the group as section Calophyllae within the subgenus Corymbia. It is related and somewhat similar to Corymbia ficifolia, a red flowered species endemic to the same region. C. calophylla differs in being larger (to about high in the wild), having much larger buds and fruit, and flowers that are usually white—occasionally pink—instead of red. However, in some areas hybridisation makes identification difficult. Common names include marri and Port Gregory gum, and a long-standing usage has been red gum due to the red sap effusions often found on trunks. Red gum was recorded as a name in use by the Swan River colonists in 1835. Other species of Corymbia (then Eucalyptus) were referred to as 'red gum', so to avoid ambiguity the Forestry Department of the Western Australian government nominated the extant name marri in the 1920s. Corymbia calophylla is still commonly known as a 'eucalypt', despite the transfer to the new genus. The Noongar peoples know the tree as gardan, kurrden, mahree, marri, nandap or ngora. Second-hand reports of Indigenous names for "red gum" were reported by correspondents in The West Australian in 1929, the name kardun attributed to the Pinjarrah people and marri from the Blackwood