water crowfoot

from The Century Dictionary.

• noun The name of several aquatic species of Ranunculus, primarily R. aquatilis, the common white water-crowfoot, a plant found through the north temperate zone and in Australia. The yellow water-crowfoot is R. multifidus.

from the GNU version of the Collaborative International Dictionary of English.

• (Bot.) An aquatic kind of buttercup (Ranunculus aquatilis), used as food for cattle in parts of England.
• an American water plant (Ranunculus multifidus), having deep yellow flowers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America