Leucaena

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Mimoseae
Genus: Leucaena
Species: L. collinsii – L. confertiflora – L. cuspidata – L. diversifolia – L. esculenta – L. greggii – L. involucrata – L. lanceolata – L. lempirana – L. leucocephala – L. macrophylla – L. magnifica – L. matudae – L. multicapitula – L. pallida – L. pseudotrichoides – L. pueblana – L. pulverulenta – L. retusa – L. salvadorensis – L. shannonii – L. trichandra – L. trichodes
Name

Leucaena Benth.

Leucaena is a genus of flowering plants in the mimosoid clade of the subfamily Caesalpinioideae of the family Fabaceae. It contains about 24 species of trees and shrubs, which are commonly known as leadtrees.[3] They are native to the Americas, ranging from Texas in the United States south to Peru.[4] The generic name is derived from the Greek word λευκός (leukos), meaning "white," referring to the flowers.[5]

Uses

Leucaena species are grown for their variety of uses, including as green manure, a charcoal source, livestock fodder, and for soil conservation. The seeds (jumbie beans) can be used as beads. Leucaena planted for firewood on an area of 120 km2 (46 sq mi) will yield an energy equivalent of 1 million barrels of oil per year. Anthelmintic medicines are made from extracts of Leucaena seeds in Sumatra,, Indonesia.[4]

Some species (namely Leucaena leucocephala) have edible fruits (as unripe) and seeds. The seeds of Leucaena esculenta (in Mexico called guaje or huaje) are eaten with salt in Mexico. In other species high levels of mimosine may lead to hair loss and infertility in non-ruminants.[4]
List of species

Leucaena collinsii Britton & Rose – Collins leadtree (Southern Mexico)[6][7]
Leucaena confertiflora Zárate
Leucaena cuspidata Standl. (Mexico)
Leucaena diversifolia (Schltdl.) Benth. – Diverseleaf leadtree (Southern Mexico, Central America)[7]
Leucaena esculenta (DC.) Benth. – Esculent leadtree[7] (Mexican highlands)[6]
Leucaena greggii S.Watson (Mexico)
Leucaena guatemalensis
Leucaena involucrata Zárate (Mexico)
Leucaena lanceolata S.Watson (Western Mexico)[6]
Leucaena lempirana C.E.Hughes (Honduras)
Leucaena leucocephala (Lam.) de Wit – White leadtree (Southern Mexico, Belize, Guatemala)
Leucaena macrophylla Benth. – Bigleaf Leucaena[7] (Lowland Mexico)[6]
Leucaena magnifica (C.E.Hughes) C.E.Hughes (Guatemala)
Leucaena matudae (Zárate) C.E.Hughes (Mexico)
Leucaena multicapitula Schery
Leucaena pallida Britton & Rose
Leucaena pueblana Britton & Rose (Mexico)
Leucaena pulverulenta (Schltdl.) Benth. – Great leadtree (Southern Texas, Northeastern Mexico).[6] It's known in Mexico as "tepeguaje" or "tepehuaje"
Leucaena retusa Benth. – Littleaf leadtree (Western Texas, Northern Mexico)[6]
Leucaena salvadorensis Standl. ex Britton & Rose (El Salvador, Honduras, Nicaragua)
Leucaena shannonii Donn.Sm. – Shannon leadtree[7] (Southern Mexico, Central America)[6]
Leucaena trichandra (Zucc.) Urb. – Hairystamen leadtree (Southern Mexico, Central America)[7]
Leucaena trichodes (Jacq.) Benth. – Hairy leadtree (Southern Central America, Northwestern South America, Hispaniola)[7][8][9]

Hybrids

Leucaena × mixtec
Leucaena × spontanea[10]

Formerly placed here

Acacia glauca (L.) Moench (as L. glauca (L.) Benth.)
Lysiloma latisiliquum (L.) Benth. (as L. latisiliqua (L.) Gillis)
Schleinitzia fosbergii Nevling & Niezgoda (as L. insularum var. guamensis Fosberg & B. C. Stone)
Schleinitzia insularum (Guill.) Burkart (as L. insularum (Guill.) Däniker)[8]

References

"Leucaena Benth". TROPICOS. Missouri Botanical Garden. Retrieved 2010-03-23.
"Leucaena Benth". Germplasm Resources Information Network. United States Department of Agriculture. 2007-10-05. Retrieved 2010-03-23.
"Leucaena". Integrated Taxonomic Information System. Retrieved 23 March 2010.
Mabberley, D.J. (1997). The Plant-Book: A portable dictionary of the vascular plants (2nd ed.). Cambridge, England: Cambridge University Press. p. 406. ISBN 978-0-521-41421-0.
Glen, Hugh (2004). Sappi What's in a Name?. Jacana Media. p. 39. ISBN 978-1-77009-040-8.
Nugent, Jeff; Julia Boniface (2004). Permaculture Plants: A Selection (2nd ed.). Chelsea Green Publishing. pp. 24–26. ISBN 978-1-85623-029-2.
Grandtner, Miroslav M. (2005). Elsevier's Dictionary of Trees. Vol. 1. Elsevier. pp. 473–475. ISBN 978-0-444-51784-5.
"Species Records of Leucaena". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2010-11-23.
Barstow, M. 2020. Leucaena trichodes. The IUCN Red List of Threatened Species 2020: e.T62026291A62026298. https://dx.doi.org/10.2305/IUCN.UK.2020-1.RLTS.T62026291A62026298.en. Downloaded on 09 April 2021.
Hartman, T. P. V; J. Jones; N. W. Blackhall; J. B. Power; E. C. Cocking; M. R. Davey (2000). Helmut Guttenberger (ed.). "Cytogenetics, Molecular Cytogenetics, and Genome Size in Leucaena (Leguminosae, Mimosoideae)". Cytogenetic Studies of Forest Trees and Shrubs: Review, Present Status, and Outlook on the Future: Proceedings of the Second IUFRO Cytogenetics Working Party S2.04.08 Symposium, September 6–12, 1998, Graz, Austria: 57–70. ISBN 9788096708888.