Geonomateae (also Geonomeae) is a palm tribe in the subfamily

Arecoideae The Arecaceae is a family of perennial flowering plants in the monocot order Arecales. Their growth form can be climbers, shrubs, tree-like and stemless plants, all commonly known as palms. Those having a tree-like form are called palm trees ...

. It is an important

Neotropic The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge ...

al group due to its wide distribution across Central and South America, its diversity and abundance, and the use of a number of species by local human populations. The distribution of the tribe stretches from southeast Mexico down through Central America and into South America, notably

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

and

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

, and species are also found in the Greater and Lesser

Antilles The Antilles (; gcf, label=Antillean Creole, Antiy; es, Antillas; french: Antilles; nl, Antillen; ht, Antiy; pap, Antias; Jamaican Patois: ''Antiliiz'') is an archipelago bordered by the Caribbean Sea to the south and west, the Gulf of Mex ...

. This tribe consists of a group of understory and sub-canopy palms that populate both tropical lowland and

montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...

s. While members of this group are relatively easy to collect, as they are not canopy palms or spiny palms, and are well represented in

herbaria A herbarium (plural: herbaria) is a collection of preserved plant specimens and associated data used for scientific study. The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sheet of paper (called ...

, the taxonomy and phylogeny of the species within the tribe are still uncertain. The resolution of the tribe has been disputed despite the fact that tribe's species are characterized by three morphological

synapomorphies In phylogenetics, an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to have ...

: the petals of pistillate flowers are basally connate, the presence of slender and elongate styles, and the flowers are borne in pits in the rachillae.Uhl and Dransfield 1987 as cited by Roncal, J. Francisco-Ortega, C.B. Asmussen, and C.E. Lewis (2005). 'Molecular phylogenetics of the tribe Geonomeae (Arecaceae) using nuclear DNA sequences of Phosphoribulokinase and RNA Polymerase II'. (Systematic Botany 30(2): 275–283)

Genera

Genera in the tribe are: *'' Welfia'' – Central America, Colombia, Ecuador *'' Pholidostachys'' – NW South America, Panama, Costa Rica *'' Calyptrogyne'' – Central America *''

Calyptronoma ''Calyptronoma'' is a genus in the palm family, native to the Greater Antilles. They have pinnately compound leaves with short petioles. The name was coined by August Grisebach who first described the genus in his 1846 ''Flora of the British ...

'' – Greater Antilles *'' Asterogyne'' – northern South America, Central America *'' Geonoma'' – Americas

References

External links

{{Taxonbar, from1=Q1503297, from2=Q5877706 Monocot tribes

Genera

See also

References

External links