"Palmately divided leaf of buttercup." -Bergen, 1896

Buttercup Leaf

"Palmately divided leaf of buttercup." -Bergen, 1896

"Submerged and aerial leaves of a European crowfoot (Ranunculus Purshii). The leaf with thread-like divisions is the submerged one." -Bergen, 1896

European Crowfoot Leaves

"Submerged and aerial leaves of a European crowfoot (Ranunculus Purshii). The leaf with thread-like…