Which preposition to use with ranunculuses

in Occurrences 1%

Pliny says this flower never opens its petals but when the wind blows; whence its name: it has properly no calix, but two or three sets of petals, three in each set, which are folded over the stamens and pistil in a singular and beautiful manner, and differs also from ranunculus in not having a melliferous pore on the claw of each petal.

of Occurrences 1%

Beside the highway were fields of young grain, prest to the ground with the snow; and in the meadows, ranunculuses of the size of roses, large yellow violets, and a thousand other Alpine flowers of the most brilliant hues, were peeping through their white covering.

Which preposition to use with  ranunculuses