Eucryphia is a small genus of trees and large shrubs in the family Cunoniaceae (order Oxalidales), comprising around seven living species native to the south temperate zones of South America and eastern Australia. The South American species — E. cordifolia and E. glutinosa — grow in the Valdivian temperate rain forests of Chile and Argentina, while the five Australian species are concentrated in Tasmania and the eastern rainforests of New South Wales, Victoria, and Queensland.
Most species are evergreen, though E. glutinosa is typically deciduous or semi-evergreen. The leaves are arranged oppositely and may be either simple or pinnate with 3 to 13 leaflets. The genus is best known for its ornamental flowers: produced in late summer and autumn when little else is in bloom, they are showy, sweetly scented, 3–6 cm across, with four creamy-white petals and a prominent mass of stamens. The fruit is a woody capsule 1–1.5 cm long that takes 12–15 months to mature.
Notable members include E. lucida, the Tasmanian leatherwood, a significant commercial source of monofloral honey; E. cordifolia (ulmo), whose timber is used for construction and furniture and whose nectar also yields honey; and E. moorei (pinkwood or eastern leatherwood), a tall rainforest tree of New South Wales and Victoria. Several interspecific hybrids have been named, and the genus has a fossil record extending to the Palaeocene.
Etymology
The generic name Eucryphia derives from the Greek eu-kryphaios, meaning "well-covered," in reference to the foliage, which is clustered toward the apices of the branches.
Distribution
The genus is native to the south temperate regions of South America — specifically the Valdivian temperate rain forests of southern Chile and Argentina — and to coastal eastern Australia, with the majority of species endemic to Tasmania. Two species occur in South America, five in Australia.
Ecology
The genus occupies temperate and subtropical rainforests, from the Valdivian forests of South America to Tasmanian wet sclerophyll and cloud forest habitats in Australia. Eucryphia lucida is the primary nectar source for Tasmanian leatherwood honey, making it ecologically important for both native pollinators and the commercial apiary industry.
Cultivation
Eucryphia species and their hybrids are valued garden trees for their showy, scented flowers produced in late summer and autumn, a season when few other trees are in bloom. Cultivation requires mild winters, cool summers, and good rainfall. Outside their native ranges, they are best suited to the Atlantic coastal regions of western Europe, the Pacific Northwest of North America, and New Zealand. Plants typically form a slender, conic crown when young, broadening with maturity.
