Horticultural future of Tabebuia in Australia
It's suprising that the Tabebuias aren't more widely grown in the warmer parts of Australia, either as street trees or in home gardens. A limited number of species are commercially available here. Importation and trials of other species may increase the options with respect to tree size and form, flower colour and cold tolerance.
So far, it seems that there's been relatively little selection, hybridisation or breeding of Tabebuias for ornamental use done at a commercial level anywhere in the world. One place to start might be selection and vegetative propagation of superior seedlings. One named cultivar that is sold in Australia is T. impetiginosa 'White Beauty" (listed as T. palmeri) with white flowers instead of the usual pink.
There has also been at least some work done in the U.S. (see links below), but there appears to be much untapped potential for developing new cultivars with desirable growth forms, increased cold tolerance, different flower colours or even repeat-blooming.
Some people have expressed concerns over the weed potenial of some Tabebuia species. Low seed-set or sterility (possibly through hybridisation) would be a therefore be a worthwhile criteria of any breeding programme in the future.
Taxonony and Nomenclature
Cultivar selection and breeding
More on Tabebuias
Describes some of the variation amongst cultivated Tabebuias in California and the seedling selection being undertaken by Monterey Bay Nursery
Including other species
Some of the species referred to in the following publications are cultivated in various parts of the world, but not widely available in Australia
Arvores do Brasil
Mostly in Portugese, but plants are identified by scientific name. Go to (Lista cientif
) so you can view the photographs of several Tabebuia species.
Pink Trumpet Tree Handroanthus heptaphyllus
Urban Forest Ecosystems Institute, California
Ipê (Tabebuia spp.)
Discusses overharvesting of these timbers in their native habitat. Rainforest Alliance
Possible misspellings: Tabebuea, Tabibuia, Tabibuea
[Click for larger image] Street tree in Rocklea, Brisbane (September 2015) tentatively identified as Handroanthus impetiginosus (Tabebuia impetiginosa synonym Tabebuia palmeri)
Unknown species. Flowering is sparse, at least at this stage. Sunnybank, Brisbane. Late July, 2016
Another unknown species. Perhaps a variety of T. rosea? Amount of wine-purple colouration in the blossoms varies. September, 2016