Many species have petal-less, long flowers called catkins, and each flower is male or female—some species, such as the pussy willow, have entire trees that are male or female.
Willows are quite flood-tolerant and prefer to grow in slightly wet soil. Many species have petal-less, long flowers called catkins, and each flower is male or female—some species, such as the pussy willow, have entire trees that are male or female.