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Roger G. Skolmen
Saligna eucalyptus (Eucalyptus saligna), also called Sydney bluegum, is a fast growing tree, valuable in plantation forestry. It grows in several warm temperate to subtropical countries, such as Brazil and the Republic of South Africa, and the state of Hawaii.
The name Eucalyptus saligna was given to type specimens in 1797. Another very similar but distinct species, found within the same geographic range, Eucalyptus grandis, was not named until 1918 (12). Before 1918, many introductions were made worldwide of seed collected from "E. saligna" that bore the characteristics of the type later to be called E. grandis. In most countries where introductions were made, therefore, considerable mixed planting and hybridization of the two species are present. Thus, in Hawaii, most saligna eucalyptus stands contain trees with a range of characteristics intermediate between those of E. saligna and E. grandis. Eucalyptus grandis is now preferred in South Africa because it self-prunes more readily and has smaller branches (28); and in Brazil because it is resistant to a canker disease and can be propagated vegetatively (6). Eucalyptus saligna has grown well where the climate is cooler; for example, in northern New Zealand (12) and in the uplands of Hawaii. Recent provenance tests of the two species in Hawaii suggest that E. grandis would be a better choice than E. saligna for most sites (26).