Rhubarb
 Rhubarb (Rheum rhabarbarum) is a species of plant in the family Polygonaceae. They are herbaceous perennials growing from short thick rhizomes. They have large leaves that are somewhat triangular with long fleshy petioles. They have small flowers grouped in large compound leafy greenish-white to rose-red inflorescences.In culinary use fresh raw petioles (leaf stalks) are crisp (similar to celery) with a strong tart taste.