Marsilea quadrifolia is one lucky plant, commonly known as the four leaf clover is a fun novel plant to have in any garden or water feature. This plant usually identified as a clover is in fact a odd looking fern. The foliage looks eactly like that of a four leaf clover. It commonly spreads from small vine like stems under ground or in the water. The leaves can either stick up in the air or lay flat floating on the waters surface depending on how shallow or deep they are. Plants are commonly sold either in 4 inch pots or as barerooted plants in bags.