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(contains Web links to Flora-On for observed plant species, Web links to high resolution Google satellite-maps (JPG) of plant-hunting regions from the Iberian peninsula; illustrated text in Portuguese language)

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sábado, 30 de janeiro de 2010

Ammophila arenaria

Ammophila arenaria

(Ammophila arenaria subsp. arundinacea (= A.
subsp. australis))

Descrição (from Wikipédia):

O estorno (Ammophila arenaria) é uma planta pertencente à família das Gramíneas (Poaceae) que ocorre nas dunas móveis ("dunas brancas") da costa atlântica.

Ammophila arenaria is a species of grass known by the common names European Marram Grass and European Beachgrass. It is one of two species of the genus Ammophila (marram grass). It is native to the coastlines of Europe and North Africa where it grows in the sands of beach dunes. It is a perennial grass forming stiff, hardy clumps of erect stems up to 1.2 metres (3.9 ft) in height. It grows from a network of thick rhizomes which give it a sturdy anchor in its sand substrate and allow it to spread outward. These rhizomes can grow laterally by 2 meters (7 feet) in six months. One clump can produce 100 new shoots annually.

The rhizomes tolerate submersion in sea water and can break off and float in the currents to establish the grass at new sites. The leaves are thick and coated in a white waxy cuticle. They are up to 1 metre (3.3 ft) long and sharply pointed. The cylindrical inflorescence is up to 30 centimetres (12 in) long. It is adapted to habitat made up of shifting, accreting sand layers, as well as that composed of stabilized dunes.

Locais de registo na Praia de Quiaios e na Serra da Boaviagem:

Ammophila arenaria regista-se nas dunas primárias (dunas brancas) da linha costeira. Mais raro é a occorência por interior em zonas com areias marítimas (dunas móveis ou zonas de antigas dunas).


Distribuição em Portugal (from Flora Digital de Portugal):

Utilização medicinal e fitoterapéutica:

Allergenicity: European Beach Grass (Ammophila Arenaria) is a moderate allergen.

Pollen de Ammophila arenaria

Pollen Description
Grains are spheroidal to ovoidal, sometimes elliptical. The exine is thin and the surface is granular to finely reticuloid. Poaceae apertures are 1-porate, with the pores usually circular to ovoidal.
Grains are 22-122 micrometers in diameter.

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