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NAME: Bitter Dock
SPECIES / FAMILY: Rumex Obtusifolius / Polygonaceae (Rumex)
OTHER COMMON NAME(S): Round-leaf dock
CONDITIONS: full sun to partial shade, moist to well-drained soil
COMMENT: When cooked it is delicious. Seeds can be used as a spice. (3) * In this editor's opinion, Patience Dock is the best dock for eating raw, but not-so-much cooked, while Bitter-Round Leaf Dock and Curly Yellow Dock are best eaten cooked, but not-so-much- raw.
CAUTION: Cook with lid off to minimize oxalic acid, as with spinach.
NUTRITION/MEDICINAL: Astringent; Blood purifier; Contraceptive; Salve. (1, 4)
LOOK-A-LIKES: other docks, young corn
OTHER USES: “dark green to brown and dark grey dyes can be obtained from the roots of many species in this genus. They do not need a mordant.” Also used for caterpillar food (1)
SOURCE LINKS (may include nutritional and medicinal info, plus other uses):
4. http://www.foragingtexas.com/2008/08/dock.html (good photos)