The leaves of cat's eye grass are very round, and there are two bracts on it.
And the leaves of Euphorbia are relatively narrow and long, not as round as the former, and there are a lot of bracts on the surface of its leaves, with five top bracts.
The capsule of cat's eye grass is glabrous, the seed belongs to the long circle, the length is about 2 mm, and it is very smooth, one side of it has longitudinal groove, no raised spots or reticulation.
The capsule of Euphorbia is glabrous, and the seed is ovoid, with raised reticulation on its surface.
The flowering and fruiting period of cat's eye grass is from April to October. There is a big difference between the two. There is no fixed flowering and fruiting period of Euphorbia.