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Jacaranda

From Wikipedia, the free encyclopedia
This article is about the plant genus. For the tree in the genus commonly called Jacaranda, see Jacaranda mimosifolia. For the rosewood, see Dalbergia nigra. For other uses, see Jacaranda (disambiguation).

Jacaranda
A flower of Jacaranda mimosifolia
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Bignoniaceae
Tribe: Jacarandeae
Genus: Jacaranda
Juss.
Type species
Jacaranda mimosifolia
Synonyms
  • Digomphia Benth.
  • Etorloba Raf.
  • Icaranda Pers.
  • Kordelestris H.Kost.
  • Nematopogon (DC.) Bureau & K.Schum.
  • Pteropodium DC.
  • Rafinesquia Raf.

Jacaranda is a genus of 49 species of flowering plants in the family Bignoniaceae, native to tropical and subtropical regions of the Americas[1] while cultivated around the world. The generic name is also used as the common name.

The species Jacaranda mimosifolia[2] has achieved a cosmopolitan distribution due to introductions, to the extent that it has entered popular culture. It can be found growing wild in Central America, the Caribbean, Spain, Portugal, southern and northern Africa, China, Australia, Rwanda and Cyprus.

Etymology

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The name is of South American (more specifically Tupi-Guarani) origin, meaning fragrant.[3] The word jacaranda was described in A supplement to Mr. Chambers's Cyclopædia, 1st ed., (1753) as "a name given by some authors to the tree the wood of which is the log-wood, used in dyeing and medicine" and as being of Tupi-Guarani origin,[4][5] by way of Portuguese.[6] Although not consistent with the Guarani source, one common pronunciation of the name in English is given by /ˌdʒækəˈrændə/.[7]

Description

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The species are shrubs to large trees ranging in size from 20 to 30 m (66 to 98 ft) tall. The leaves are bipinnate in most species, pinnate or simple in a few species. The flowers are produced in conspicuous large panicles, each flower with a five-lobed blue to purple-blue corolla; a few species have white flowers. The fruit is an oblong to oval flattened capsule containing numerous slender seeds. The genus differs from other genera in the Bignoniaceae in having a staminode that is longer than the stamens, tricolpate pollen, and a chromosome number of 18.

Taxonomy

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The genus is divided into two sections, sect. Monolobos and sect. Dilobos DC., based on the number of thecae on the anthers. Sect. Monolobos has 18 species and is found primarily in western South America, Central America, Mexico, and the Caribbean. Sect. Dilobos, which is believed to be the primitive form, has 31 species and is found primarily in southeastern Brazil including the Paraná River valley. The anatomy of the wood in the two sections also differs. Although usually treated in sect. Monolobos, J. copaia differs somewhat from all other members of the genus and may be intermediate between the two sections (Dos Santos & Miller 1997).

Species

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Sect. Monolobos

Sect. Dilobos

Cultivation

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Jacaranda seedling

Jacaranda can be propagated from grafting, cuttings, and seeds, though plants grown from seeds take a long time to bloom. Jacaranda grows in well-drained soil and tolerates drought and brief spells of frost and freeze.[9][10]

This genus thrives in full sun and sandy soils, which explains their abundance in warmer climates. Mature plants can survive in colder climates down to −7 °C (19 °F); however, they may not bloom as profusely. Younger plants are more fragile and may not survive in colder climates when temperatures drop below freezing.

Uses

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Several species are widely grown as ornamental plants throughout the subtropical regions of the world, valued for their intense flower displays. The most often seen is the blue jacaranda (Jacaranda mimosifolia; syn. J. acutifolia hort. non Bonpl.). Other members of the genus are also commercially important; for example the Copaia (Jacaranda copaia) is important for its timber because of its exceptionally long bole.

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References

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  1. ^ Gentry, A. W.; Morawetz, W. (1992). "Bignoniaceae: Part II (Tribe Tecomeae)". Flora Neotropica. 25 (2): 51–104. JSTOR 4393739.
  2. ^ "Jacaranda mimosifolia D.Don". Plants of theWorld Online.
  3. ^ "Jacaranda mimosifolia - Parcs i Jardins - Itineraris". bcn.cat.
  4. ^ Oxford English Dictionary 2nd Ed. (1989)
  5. ^ "Jacaranda". Online Etymology Dictionary. Retrieved 2012-03-07.
  6. ^ "Jacaranda". Merriam Webster. Retrieved 2012-03-07.
  7. ^ Wells, John C. (2009). "jacaranda". Longman Pronunciation Dictionary. London: Pearson Longman. ISBN 978-1-4058-8118-0.
  8. ^ Silva-Castro, Milene Maria Da (2017). "A new species of Jacaranda (Bignoniaceae) from the Chapada Diamantina (Bahia, Brazil)". Phytotaxa. 295 (3): 287–291. doi:10.11646/phytotaxa.295.3.10. ISSN 1179-3163.
  9. ^ "Jacaranda Tree". The Lovely Plants. Archived from the original on 2015-12-25. Retrieved 2010-10-05.
  10. ^ "Jacaranda Tree". www.wikilawn.com. Retrieved 13 May 2020.
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