Hordeum marinum

Salt barley, a reference photo
Photo: E Wusk · CC BY-SA 4.0 (licence)

Hordeum marinum, commonly known as sea barley or (subspecies gussoneanum) Mediterranean barley, is a species of flowering plant in the grass family Poaceae that grows on bare ground on the shores of Europe and North Africa. It is also found in inland salt flats such as the Pannonian grasslands of Hungary, and it is widely established outside its range in temperate regions of both the north and south hemispheres. It is an annual, producing copious seed when habitat conditions are right, but not persisting in competition with other species. Although it is a relative of an important crop species, it has no uses itself.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Salt barley being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Classification

Kingdom
Plantae
Phylum
Tracheophyta
Class
Liliopsida
Order
Poales
Family
Poaceae
Genus
Hordeum
Species
Hordeum marinum

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Salt barley (Hordeum marinum) · B.inomen