Woody > Tabebuia > Tabebuia roseo-alba > Tabebuia roseo-alba
Tabebuia roseo-alba
White Trumpet Tree, Ipê-branco, Pau-d’arco
Origin: South America, most commonly in Brazil, but specimens have been located in Columbia, Bolivia, Paraguay and sparingly in Argentina and Peru. In Brazil, it occurs in all states, particularly in Cerrados (tropical savannahs) and on the margins of the wetlands in Matto Grosso.
Mike's
Opinion
"
A highly attractive tree that draws a lot of attention when it becomes covered in cloud-like blooms that cover the tree and carpet the ground below in solid white. The consistently warm temperatures it requires means it will likely never achieve popularity as a landscaping plant in North America - except potentially in specific hardiness zones in the United States - which is a shame, as it easily rivals other ornamental trees such as Cherry and Magnolia in beauty. If environmental conditions can be met, it is quite hardy, and easily propagated.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Bignoniaceae |
| Genus |
| Tabebuia |
| Species |
| roseo-alba |
| Category |
| Woody |
| Type |
| Tree (deciduous) |
| USDA Hardiness Zone |
| 9 - 11 |
| Canadian Hardiness Zone |
| 9a or greater |
| RHS Hardiness Zone |
| H1c - H3 |
| Temperature (°C) |
| 20 - 30 |
| Temperature (°F) |
| 68 - 86 |
| Height |
| 7 - 16 m |
| Spread |
| 3 - 5 m |
Photographs
Cultivars
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Description and Growing Information
Flowering Period
| General Description |
| A small deciduous tropical tree native to South America, with showy clusters of flowers that can occur multiple times per year. It is often planted as a specimen tree in landscapes and gardens. This plant is ideal for its tolerance of drought, fast growth, and relatively few pests. |
| Landscape |
| In urban areas it is commonly used as a street tree and ornamental landscaping tree for its smaller size, blooms, and little need for frequent watering. It is also commonly used in landscape restoration because of the aforementioned qualities, as well as its fast propagation and growth. |
| Cultivation |
| This tree thrives in full sun to light shade in stony, well drained soils, with low to medium water requirements and high drought tolerance. Pruning when the tree is young is recommended for it to develop a strong structure. As it is known to occur naturally in limestone based soils, it may tolerate slightly more alkaline soil conditions. |
| Shape |
| Has a generally pyramidal canopy form. Growth is upright with a central leader, with a low tendency towards codominant stem growth. |
| Growth |
| Fast |
| ID Characteristic |
| Identifiable by its small size, ridged bark, and large numerous clusters of white flowers with yellow throats that occur when the tree is leafless. When in leaf and before flowering, Tabebuia roseo-alba can be identified by the trifoliate composite leaves in a bright rich green colour, and the pod-like flower buds that extend on long pedicels from the branches. After flowers and leaves have dropped, the identifying characteristic are the long thin fruits. |
| Pests |
| No commonly occurring pests or diseases, but the bark is prone to lichen growth, which is only cosmetic and does not harm the tree. |
| Habitat |
| Tabebuia roseo-alba is known to exhibit heliophyte and selective xerophyte characteristics. It can be found in semi deciduous primary and secondary forests, and on rocky outcrops (most commonly limestone based substrates). It most often occurs as a single tree. |
| Bark/Stem Description |
| Young bark is mainly smooth and lighter brown, but develops a highly fissured texture and increased thickness as it ages. Mature bark is medium to dark brown in colour, though it is known anecdotally to appear nearly black in urban areas with high air pollution. New branch growth is light yellow-green. It exhibits dichotomous branch growth (equal division of a terminal bud.) Trunk diameter averages 40-50 cm in mature trees. There is no colour differentiation between the hardwood and sapwood. |
| Flower/Leaf Bud Description |
| Flower buds are smooth, green and elongated, being 1.5-2cm in length and extending from 1-2cm yellow-green pedicels. |
| Leaf Description |
| Trifoliate composite leaves, 6-11cm long and 4-6cm wide, with a slightly larger middle leaflet. They are medium green in colour, ovately shaped with an entire margin and pinnate veining. Petioles and petiolules are round and green. The leaves are lightly pubescent on both sides. The terminal buds are 6mm-8mm, greenish brown and pointed. No colour change occurs in the leaves before abscission. |
| Flower Description |
| The corollas are whitish-pink trumpet shaped flowers with yellow throats 7-17cm long, with 2-3 broken sepals that occur in large clusters of 7-10. Externally glaborous and internally pubescent. The bloom schedule depends on the environment the tree is located in. In climates with dry seasons, blooming occurs after the tree has shed its leaves. Flowering period is from July to October and lasts 2-3 days. This species is allogamous (cross pollinating), and relies on pollinating insects. |
| Fruit Description |
| The fruit is a glaborous dehiscent capsule, thin and cylindrical, approx. 18cm long and smooth. It appears green and striated when immature and black when mature. They are filled with delicate translucent white and double winged seeds dispersed by wind. One kilogram is equivalent to approx. 71,000 seeds. The fruiting period typically begins in October. |
| Colour Description |
| When in flower, Tabebuia roseo-alba exhibits strong contrast between dark toned bark and bright white flowers. Leaves are a medium green, and do not exhibit seasonal colour change. There is slight variation in the colour of the bark (ranging from light grey-brown to dark medium brown) depending on location and age of the tree. Flowers are whitish-pink with yellow throats, and their colour does not show any variation. |
| Texture Description |
| Distinguishing textures of Tabebuia roseo-alba are the leaves, which are very finely haired on top and bottom, and the bark, which grows thicker and highly fissured as the tree ages. The flowers are glaborous (smooth and shiny) on the exterior and lightly pubescent on the interior. |
| Notable Specimens |
| Jardim Botanico do Rio de Janeiro (Rio de Janeiro Botanical Garden) Rio de Janeiro, Brazil. |
| Propagation |
| Seeds can be harvested from mature fruits when they have opened, or picked and left in the sun until opening has completed, and planted immediately in organic clay substrate. Germination takes 8-18 days and best results occur between 20 to 35 degrees Celsius. Seedlings can be transplanted to larger pots when they are 4-6cm in length, and are ready for planting in their final intended location in 3-4 months. The seeds store longer if kept in a refrigerator, and it is recommended for best germination results that seeds be used within six months. |
| Ethnobotanical Uses (Disclaimer) |
| The wood of trees within the Tabebuia Genus (commonly known as “Ipê” in South America, and to woodworkers worldwide) is commonly used for interiors and cabinetry for its warm red-brown colour and durability, and as a result it has suffered from over harvesting. Tabebuia roseo-alba was historically used for its medicinal properties by the Indigenous people of Brazil, and modern studies have confirmed that extracts of the bark and leaves have an antimicrobial affect towards E. coli and Staphylococcus bacteria, and has also been shown to have an anti-inflammatory effect on mice. It is also used in reforestation efforts due to its easy propagation from seed, and tolerance to a range of growing conditions. It is occasionally used as a honey plant for beekeepers. |
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