Details Revise & Edit the following: Some plants and seeds are unique because of there size. One kind of palm tree in the Seychelles ilands has a huge seed that can weigh more then 60 pounds. Found in california, the tallest tree speces is the coast redwood, which can grow over 375 feet high. The leaves of the giant Amazon water lily can grow as large as 8 feet across. Have you ever see Wolffia, the worlds smallest flowering plants, in a pond lake, or stream, two full-size Wolfha could fit inside a letter "o"!​