Rumex hymenosepalus
Conservation status
Secure  (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Polygonaceae
Genus:	Rumex
Species:	R. hymenosepalus
Binomial name
Rumex hymenosepalus Torr.
Synonyms[1]
Rumex arizonicus Rumex hymenosepalus var. salinus Rumex salinus Rumex saxei

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 North American deserts in the southwestern United States and northern Mexico. It is a common food plant of the ruddy copper larvae.^[3]

Uses

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.^[4] 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.^[5]

Taxonomy

Rumex hymenosepalus was first described by American botanist John Torrey in the Report on the United States and Mexican Boundary in 1859.^[6]

Synonyms

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

References

External links

Wikisource has the text of the 1905 New International Encyclopedia article "Canaigre".

• Media related to Rumex hymenosepalus at Wikimedia Commons
• "Rumex hymenosepalus". Plants for a Future.
• "Rumex hymenosepalus". Calflora. Berkeley, California: The Calflora Database.
• Rumex hymenosepalus in the CalPhotos photo database, University of California, Berkeley
• The Jepson Manual eFlora (TJM2) treatment of Rumex hymenosepalus

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