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Hornwort's sturdy, bristly foliage can help to eliminate algae and clarify water. The plant's tips get shorter and thicker in the fall, eventually falling off and turning to buds. Hornwort is typically found floating in water or loosely anchored in mud, and it can be rooted in an aquarium or left floating. Its dark green leaves can reach lengths of 11/2 inches, and its stems can grow to be as long as 2 feet.
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