Rumex hymenosepalus

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Rumex hymenosepalus
Rumex hymenosepalus 2.jpg

Secure (NatureServe)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Rumex
Species: R. hymenosepalus
Binomial name
Rumex hymenosepalus

Rumex arizonicus
Rumex hymenosepalus var. salinus
Rumex salinus
Rumex saxei[1]

Rumex hymenosepalus, commonly known as canaigre, canaigre dock, ganagra, wild rhubarb, Arizona dock, and tanner's dock,[2] is a perennial flowering plant which is native to the western United States and northern Mexico.


It has been cultivated in the southwestern United States for the roots, a good source of tannin, which is used in leather tanning. It also yields a warm, medium brown dye.[3] The leaves and leaf stalks are considered edible when young, the older leaf stalks cooked and eaten like rhubarb, which is in the same plant family.[4]


Rumex hymenosepalus was first described by American botanist John Torrey in the Report on the United States and Mexican Boundary in 1859.[5]

  • Rumex arizonicus Britton
  • Rumex salinus A. Nelson
  • Rumex hymenosepalus var. salinus (A. Nelson) Rech.
  • Rumex saxei nom. nudum. UNAM


  1. ^ Rumex hymenosepalus. Flora of North America.
  2. ^ USDA GRIN taxonomy
  3. ^ Canaigre.
  4. ^ American Indian Cooking: Recipes from the Southwest, Carolyn Niethammer
  5. ^ Torrey, J. 1859. Report on the United States and Mexican Boundary. Botany 2(1): 177–178. 1859.1

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