The smallest individual flowering plant is watermeal, a member of the duckweed family. The plant itself is 1/32 of an inch in width, or about the size of a pinhead. The light green free-floating, rootless plant grows in lakes and ponds, and weighs about 1/190,000 of an ounce, equivalent to two grains of table salt. They are very hard to see; in fact, you would need about 5,000 plants to fill up one thimble. However, because they grow in colonies, these plants look like algae spreading across the water. Their capacity to reproduce very quickly can cause a pond to be completely covered in the green plants in just a few weeks.

• What it the largest flower in the world?
• Can you eat flowers?
• Do all flowers close up at night?
• What makes a plant bloom at the right time of year?
• Why are so many flowers brightly colored?
• What is the difference between annual, perennial, and biennial flowers?
• When did the first flowers bloom?
• What are comets?
• What is the difference between a bulb, a corm, and a tuber?
• Are there plants that do not grow from seeds?
• What is the difference between self pollination and cross pollination?
• Does the expression “Open sesame!” have anything to do with sesame seeds?
• How do flowering plants make their seeds?
• Which plant spreads its seeds with the help of children at play?
• Do animals ever carry seeds?
• How do seeds become plants?
• What is a seed?
• Do all plants have flowers?
• What are the patterns of stars called?
• How are a water lily’s leaves different?