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What we commonly refer to as a sunflower seed, the black-and-white hard-shelled item we often snack on, is referred to as the achene (fruit). The fruit wall is the shell, and the softer inner...
Sunflowers are annual plants that are native to the Americas. Their stems can grow to more than 10 feet high, and their flower heads can reach nearly 12 inches in diameter. The scientific name for...