There are a few ways to tell if a flower is monocot or eudicot. One way is to look at the number of petals on the flower. Monocots typically have three petals, while eudicots typically have four or more. Another way to tell is by looking at the leaves. Monocots typically have one main vein running through the center of the leaf, while eudicots typically have several veins running through the leaf. Finally, you can also tell by looking at the seed pods. Monocots typically only have one seed per pod, while eudicots can have two or more seeds per pod.