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Arjona patagonica is a species of flowering plant in the family Schoepfiaceae native to southern South America.
In Argentina it has been collected in the provinces of Buenos Aires, Chubut, La Pampa, Mendoza, Neuquén, Río Negro, San Juan, Santa Cruz and Tierra del Fuego. In Chile it has been collected in the regions of Araucanía, Coquimbo, Libertador Bernardo O'Higgins, Magallanes and Valparaíso.
According to a 1968 report by Martínez Crovetto on the (former) uses of plants (i.e. ethnobotany), this species formed an important part of the diet of the Selkʼnam people, who called it téen in their language, one of their only sources of carbohydrates. The tubers are 5 to 9mm wide, and up to 20 cm long. The tubers shrink to 2mm in diameter during flowering in Spring, and are best harvested in fall months of March and April. They contain mostly water and some polyphenols. The plant is eaten by livestock; it has been rated as nutritionally extremely poor as a fodder in terms of palatability, digestibility and crude protein content according to the 1987 Lara & Cruz system.
Text excerpted from the Wikipedia article Arjona patagonica by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
