Geissois

Geissois is a genus of trees and shrubs in the plant family Cunoniaceae. It includes about 19 species mostly found in New Caledonia, but also in Fiji, Vanuatu, and the Solomon Islands. Leaves are opposite, palmate with 3-9 leaflets, with entire margin (serrate in Geissois hirsuta and juveniles) and intrapetiolar stipules. The inflorescences are simple racemes (trident in Geissois hirsuta) and bottle-brush like. The flowers have four red sepals, lacking petals, with many long red stamens. The fruit is a capsule, the seeds flat and winged. The genus includes several nickel hyperaccumulator (most species occurring on ultramafic rocks)[2][3] and one aluminum hyperaccumulator, Geissois polyphylla.[3]

Geissois
Geissois racemosa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Oxalidales
Family: Cunoniaceae
Genus: Geissois
Labill.[1]
Type species
Geissois racemosa
Labill.[1]
Geissois racemosa wood - MHNT

Two species from Australia formerly placed in this genus have now been transferred to the genus Karrabina.[1]

Species

References
  1. Hopkins, H. C. F.; Rozefelds, A. C.; Pillon, Y. (18 Oct 2013). "Karrabina gen. nov. (Cunoniaceae), for the Australian species previously placed in Geissois, and a synopsis of genera in the tribe Geissoieae". Australian Systematic Botany. 26 (3): 167–185. doi:10.1071/SB12037. Retrieved 23 Dec 2013.
  2. Jaffré, T., Brooks, R.R. & Trow, J.M. (1979). Hyperaccumulation of nickel by Geissois species. Plant and Soil 51 : 157‑62.
  3. Pillon, Y., Hopkins, H.C.F, Rigault, R., Jaffré, T. & Stacy, E.A (2014). Cryptic adaptive radiation in tropical forest trees in New Caledonia. The New Phytologist 202 : 521‑30.
  4. Hopkins, H.C., Pillon, Y., Hoogland, R.D. (2014). Cunoniaceae : Flore de la Nouvelle-Calédonie, volume 26. Publications scientifiques du Muséum, Paris ; IRD, Marseille, 455 p. (collection Faune et Flore tropicales ; 45)
  5. Smith, Albert C. (1985). "Geissois Labill.". Flora Vitiensis nova: a new Flora of Fiji (Digitised, online, via biodiversitylibrary.org). Vol. 3. Lawai, Kauai, Hawaii: Pacific Tropical Botanical Garden. pp. 12–18. Retrieved 23 Dec 2013.
  6. Hopkins, H.C.F. (2006). Nomenclature and typification in Geissois (Cunoniaceae) in the South-West Pacific. Adansonia 28 : 311‑27.
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