water-buttercup

These exquisite little creatures attach themselves to the leaves and stems of water-plants; they are most readily seen on the finely cut leaves of the water-buttercup or spiked milfoil.

Country Walks of a Naturalist with His Children W. Houghton

Here is plenty of water-buttercup -- a very interesting plant by-the-bye, and one which is subject to much variation; for when it grows in swiftly flowing water all the leaves are very long and hair-like, but in still water there are flattened leaves as well, and the hair-like leaves are not nearly so long.

Country Walks of a Naturalist with His Children W. Houghton

'This is the _Fearaban_ (water-buttercup); and it's good for every bone of your body.

Poets and Dreamers Studies and translations from the Irish Lady Gregory 1892