Allagoptera arenaria

Common name

seashore palm, coco da praia


Stems: Solitary, subterranean (rarely growing above ground, vertically or horizontally). The palm may appear to have multiple stems when several seeds germinate in close proximity to form a cluster. Leaves: Pinnate, 1-1.5 m long, with linear leaflets spreading in multiple planes, grouped in clusters of 2's or 3's. Upper leaf surface, green or waxy gray; undersurface, whitish or silvery. Flowers and fruits: A short, dense spike protected by a woody spathe and not branched. Triads with a central female flower bordered by two male flowers occur at the base of the spike while toward the tip, only male flowers appear. The irregularly spherical to turbinate fruits (1.5-2.5 cm) are densely clustered and yellow green when ripe, sometimes with brown tomentum.

Diagnostic features

Field: Short or subterranean stemmed palm with irregularly arranged pinnate leaflets; green above and silvery white below, without spines. Inflorescence, a spike with a woody spathe.

May be confused with

Acrocomia aculeata (as a juvenile before the stem grows aerially, perhaps), but that palm has leaf spines while Allagoptera arenaria is not armed.


Native to coastal Brazil, behind dunes

Additional comments

This is a palm of the seashore, dunes, and dry, open maritime forests; it is tolerant of salt spray and can be seen as a cultivated palm in coastal areas.

Scientific name

Allagoptera arenaria (Gomes) Kuntze




Allagoptera pumila Nees

Cocos arenaria Gomes

Diplothemium arenarium (Gomes) Carv.Vasc. & Franco

Diplothemium littorale Martius

Diplothemium maritimum Martius

Last Updated May 2014