Jacaranda characteristics, habitat, species, uses

2685
Simon Doyle
Jacaranda characteristics, habitat, species, uses

The gender Jacaranda It is a member of the Bignoniaceae family, a family of dicotyledonous plants. It is common to find plants of this genus in regions of tropical and subtropical America. On the other hand, the members of the genus are characterized by presenting a tree-like life form.

Trees of the genus Jacaranda They are medium to large in size (some Brazilian species are shrubs or subshrubs). Furthermore, the leaves of these trees are bipinnate. In turn, they present inflorescence.

Jacarandas on a street in La Plata, Argentina. Source: Wikimedia Commons

For their part, the fruits are oblong capsules and the seeds are thin and winged. Some trees are characterized by producing lilac flowers.

At present some 49 species of this genus are known. These species are distributed in tropical and subtropical regions and are very common in tropical America. They are pioneer species highly demanding of light.

Plants of the genus Jacaranda they have interesting biological and chemical properties. Currently, its applications range from use as an antiparasitic to use as an antitumor. Likewise, the trees of this genus are exploited for their wood.

Article index

  • 1 Features
  • 2 Habitat and distribution
  • 3 Species
  • 4 Uses and applications
    • 4.1 Timber industry
    • 4.2 Treatment of diseases
  • 5 References

Characteristics

The gender Jacaranda It is characterized by having medium-sized trees to some large ones. However, some species in Brazil have a shrub-like or subshrub-like life form..

The foliage is deciduous and the leaves are generally bipinnate. Some trees show pinnate leaves, and few have simple leaves.

Likewise, the trees present paniculate inflorescence that can be terminal or axillary. Thus the inflorescence can be pauciflora or multiflora, and sometimes the inflorescences are born from old branches.

Meanwhile, the calyx is short and wide, bell-shaped. They can also be dome-shaped, almost truncated. The calyx generally has five denticulate or sharply lobed sepals.

On the other hand, the corolla is blue-purple, tubular, bell-shaped. It may also present pubescence or be devoid of hair. Likewise, the stamens have anthers without pubescence, frequently of a single teak. Pollen grains are smooth on their cover and have three openings at their equator..

Male Black Honeyeater on a Jacaranda tree. Sandy Hollow, NSW, Australia [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]

On the other hand, the fruits of Jacaranda plants are oblong capsules, frequently flattened perpendicular to the septum. In addition, the capsules are dehiscent perpendicular to the septum and parallel to the compression plane..

On the other hand, the fruit valves are glabrous (without pubescence) with a wavy margin. In turn, the seeds are thin and winged, with hyaline or brown membranous wings.

Jacaranda fruit. Tencho [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]

Habitat and distribution

The gender Jacaranda It contains 49 species around the world and they are native to Central America, the Caribbean and South America. In tropical America they are distributed from the south of Mexico, passing through the Antilles, until reaching Argentina. They are also widely cultivated on the European continent.

Jacaranda micrantha. Source: Wikimedia Commons

Of the 49 species of Jacaranda, 39 taxa are endemic to Brazil. Several of these Brazilian species have been reported from a single location: Jacaranda bullata, Jacaranda egleri, Jacaranda intricata, Jacaranda morii, Jacaranda paucifoliolata, Jacaranda praetermissa.

By your side, Jacaranda decurrens it is an endemic species of the Cerrado region in Brazil. Other species, Jacaranda copaia, It is considered a neotropical species of humid forests that is distributed from Belize, through Brazil and Bolivia.

Jacaranda brasiliana. mauroguanandi [CC BY 2.0 (https://creativecommons.org/licenses/by/2.0)]

In Colombia there are eight taxa represented, of which one is not native: Jacaranda mimosifolia. This last species is distributed by the northeast of Argentina and bordering areas of Bolivia, and is widely cultivated in tropical and subtropical countries..

Generally the trees of Jacaranda they are pioneers. This leads to them being very light demanding as well, which is why they tend to colonize clearings in forests..

For their part, the seeds are scattered by the wind, after which they germinate. They can later colonize the open areas that were created by falling trees..

Species

The gender Jacaranda It comprises about 49 species worldwide, of which the following can be mentioned:

  1. Jacaranda acutifolia
  2. Jacaranda arborea
  3. Jacaranda bracteata Bureau & K. Schum.
  4. Jacaranda brasiliana (Lam.) Pers.
  5. Jacaranda bullataH.Gentry
  6. Jacaranda caerulea (L.) J.St.-Hil.
  7. Jacaranda campinae H.Gentry & Morawetz
  8. Jacaranda carajasensis H.Gentry
  9. Jacaranda caroba (Vell.) DC.
  10. Jacaranda copaia (Aubl.) D.Don
  11. Jacaranda copaia spectabilis (Mart. ex DC.) A.H. Gentry
  12. Jacaranda cowellii Britton & P. ​​Wilson
  13. Jacaranda crassifolia Morawetz
  14. Jacaranda decurrens
  15. Jacaranda duckei Wattimo
  16. Glabrous jacaranda (DC.) Bureau & K. Schum.
  17. Jacaranda grandifoliolata H.Gentry
  18. Jacaranda hesperia Dugand
  19. Jacaranda intricata H.Gentry & Morawetz
  20. Jacaranda irwinii H.Gentry
  21. Jacaranda jasminoides (Thunb.) Sandwith
  22. Jacaranda macrantha
  23. Jacaranda macrocarpa Bureau & K. Schum.
  24. Jacaranda micrantha
  25. Jacaranda microcalyx H.Gentry
  26. Jacaranda mimosifolia Don
  27. Jacaranda montana Morawetz
  28. Jacaranda mutabilis
  29. Jacaranda obovata
  30. Jacaranda obtusifolia
  31. Jacaranda obtusifolia rhombifolia (G.Mey.) A.H. Gentr
  32. Jacaranda orinocensis Sandwith
  33. Jacaranda paucifoliata ex DC.
  34. Jacaranda paucifoliolata ex A. DC.
  35. Jacaranda poitaei
  36. Jacaranda praetermissa Sandwith
  37. Jacaranda puberula Cham
  38. Jacaranda pulcherrima Morawet
  39. Jacaranda racemosa
  40. Jacaranda rufa Silva manso
  41. Rough jacaranda H.Gentry
  42. Jacaranda selleana
  43. Jacaranda simplicifolia Schum. ex Bureau & K. Schum.
  44. Jacaranda sparrei H.Gentry
  45. Jacaranda subalpina Morawetz

Uses and applications

Wood industry

The trees of Jacaranda They are widely used in the lumber industry, due to the physical properties of the wood produced. The high degree of hardness of their logs, and especially their properties and appearances, make them used in the production of high value manufactured articles such as furniture..

In Brazil, the timber industry from Jacaranda it has been on the rise in recent years. The exploitation of wood, mainly of the species J. copaia have made Brazil one of the first wood producers.

The trees of J. copaia They have high potential to be exploited for their wood, since they are considered the fastest growing timber tree.

Disease treatment

Also, the species of Jacaranda they have ethnobotanical qualities, due to the fact that certain metabolites have antiparasitic properties, mainly against malaria. Some of its metabolites, mainly triterpenes, phenols and quinones, are highly studied for their active properties. Similarly, extracts from some species of this genus have been found to have antitumor properties.

Jacaranda acutifolia in the Botanical Garden of the University of Debrecen. Krzysztof Ziarnek, Kenraiz [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]

For example, J. acutifolia It is used in the treatment of wounds and dermatitis. The foliar extracts of J. caerulea They are used for the treatment of abscesses and pimples. For his part J. caroba it is used as an astringent, as a diuretic and against syphilis. In Bolivia, J. cuspidifolia it is used to treat leishmaniasis. The latter disease is treated by the extracts of several species of Jacaranda.

References

  1. Bertoni, B., Telles, M.P., Malosso, M.G., Torres, S.C.Z., Pereira, J.O., Lourenço, M.V., França, S.C., Pereira, A.M.S., 2010. Genetic diversity in natural populations of Jacaranda decurrensdetermined using RAPD and AFLP markers. Genetics and Molecular Biology. 33 (3), 532-538.
  2. Jones, F.A., Hubbell, S.P., 2006. Demographic spatial genetic structure of the Neotropical tree, Jacaranda copaia. Molecular Ecology. 15, 3205-3217.
  3. Cachet, M.S., Schühly, W., 2008. Jacaranda- An ethnopharmacological and phytochemical review. Journal of Ethnopharmacology. 121, 14-27.
  4. Jacaranda Juss., Gen. PL: 138. 1789.
  5. Maués, M.M., De Oliveira P.E., Kanashiro, M., 2008. Pollination biology in Jacaranda copaia (Aubl.) D. Don. (Bignoniaceae) at the “Floresta Nacional do Tapajós”, Central Amazon, Brazil. Brasil Bot Magazine. 31 (3), 517-527.
  6. The Plant List (2013). Version 1.1. Posted on the internet; http://www.theplantlist.org/tpl1.1/search?q=jacaranda (Accessed May 11, 2019).
  7. Wright, S.J., van Schaik, C.P., 1994. Light and phenology of tropical trees. The American Naturalist. 143 (1), 192-199.

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