early spring red rhubarb stalks growing out of a rhubarb crown. depicting edible, perennial vegetable with oxalic acid, making

acid angiosperms buckwheat canadian caryophyllales close crown crowning cultivated dormancy early edible eudicots gardening genus growing herbaceous leaf leaves macro medicinal out oxalate oxalic perennial pink plant planted poisonous polygonaceae polygonoideae red rhabarbarum rheum rhizomes rhubarb root roots spring stalks vegetable