Aspidosperma quebracho-blanco

Aspidosperma quebracho-blanco
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Apocynaceae
Genus:	Aspidosperma
Species:	A. quebracho-blanco
Binomial name
	Aspidosperma quebracho-blanco; Schltr.
Synonyms[1]
	Macaglia quebracho-blanco (Schltdl.) A.Lyons; Aspidosperma quebracho Griseb; Macaglia quebracho (Griseb.) Kuntze; Aspidosperma crotalorum Speg.;

Quebracho blanco, called kebrako or white quebracho,[2] is a South American tree species, native to Brazil, N Argentina, Bolivia, Paraguay, and Uruguay.[1] It must not be confused with other species also known as quebracho, but belonging to the genus Schinopsis.[3]

Growth

Aspidosperma quebracho-blanco

Quebracho blanco wood is uniformly yellow-ochre, without differences between hardwood and sapwood. It is quite heavy (relative density = 0.885 g/cm³) and hard, and responds well to bending and shock. Upon drying it tends to collapse, producing deformations and cracks, so the drying process is slow; the wood must be treated with fungicides. It is easy to work and has many uses in carpentry (carts, wheels, floors, shoes, tool handles, furniture); it is also good for chess pieces, skis, etc. Preserved with creosote it can be used outdoors. In some places it is widely used as coal, since it does not produce sparks or large amounts of ash, and it burns strong and slowly.[4]

Other chemicals

Quebrachitol is a cyclitol, a cyclic polyol found in the bark of A. quebracho.[5] Quebrachine is a chemical synonym for yohimbine since it was first isolated from the bark of A. quebracho-blanco.

Cultivars

'Pendula' - with weeping branches.[6]

References

Kew World Checklist of Selected Plant Families
"Aspidosperma quebracho-blanco". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 24 December 2017.
Morales, J.F. (2010). La familia Apocynaceae s. str. (Apocynoideae, Rauvofioideae) en Uruguay. Darwiniana 48: 68-86.
Libro del Árbol, Tome II, edited by Celulosa Argentina S. A., Buenos Aires, Argentina, October 1975.
Quebrachitol. Jan van Alphen, Ind. Eng. Chem., 1951, 43 (1), pp 141–145, doi:10.1021/ie50493a041
Govaerts, R., Michielsen, K. & Jablonski, E. (2011). Untraced Weeping Broadleaf cultivars: an overview. Belgische Dendrologie Belge Archived March 22, 2012, at the Wayback Machine 2009: 19-30.

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[g-1] Kew World Checklist of Selected Plant Families

[2] "Aspidosperma quebracho-blanco". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 24 December 2017.

[3] Morales, J.F. (2010). La familia Apocynaceae s. str. (Apocynoideae, Rauvofioideae) en Uruguay. Darwiniana 48: 68-86.

[4] Libro del Árbol, Tome II, edited by Celulosa Argentina S. A., Buenos Aires, Argentina, October 1975.

[5] Quebrachitol. Jan van Alphen, Ind. Eng. Chem., 1951, 43 (1), pp 141–145, doi:10.1021/ie50493a041

[6] Govaerts, R., Michielsen, K. & Jablonski, E. (2011). Untraced Weeping Broadleaf cultivars: an overview. Belgische Dendrologie Belge Archived March 22, 2012, at the Wayback Machine 2009: 19-30.