- Crucianella stylosa, an ornamental plant.
- Cruciata laevipes, the smooth bedstraw.
- Lysimachia quadrifolia, a herbaceous plant of united states.
- A name directed at a number of hidden flowers having leaves in whorls of four, as types of Crucianella, Valantia, etc.
- A name of flowers of varied genera, particularly Galium cruciatum (see Galium), Eupatorium perfoliatum (more commonly known as boneset), Lysimachia quadrifolia, and flowers of this genus Crucianella.