Salicornia rubra, commonly known as the red glasswort or Rocky Mountain glasswort, is a species of flowering plant in the family Amaranthaceae. It is native to colder or higher areas of North America; the Yukon, Nunavut, British Columbia, Alberta, Saskatchewan, Manitoba, and Ontario in Canada, and the western and north-central United States. It has been introduced to Quebec and Michigan, and has gone extinct in Illinois. A halophyte, it is one of the most salt-tolerant plants of North America.

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