[kuh-nahy-gree] 
| a plant, Rumex hymenosepalus, of the buckwheat family, found from Oklahoma to California, having clustered, tuberous roots that yield tannin. |
| ca·nai·gre (kə-nī'grē) n. A perennial herb (Rumex hymenosepalus) native chiefly to southwest North America, having tannin-rich, tuberous roots formerly used for tanning and in herbal medicine. [Spanish.] |