Rhubarb is a vegetable derived from cultivated plants in the genus Rheum in the family Polygonaceae. The whole plant – a herbaceous perennial growing from short, thick rhizomes – is also called rhubarb. Historically, different plants have been called rhubarb in English. The fleshy, edible stalks of other species and hybrids (culinary rhubarb) were cooked and used for food.A brightly coloured and distinctive bolete, Boletellus obscurecoccineus has a rosered or rhubarbcoloured, hemispherical to convex cap to a diameter of 7 cm (3 in), with an overhanging margin when young. The cap may crack in older specimens, and reveal the yellow flesh beneath.
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