Identification and Control of Common Weeds in Corn Types of Plants Knowing the type of plant a weed is is the starting point for herbicide selection. It is also the starting point for identifying weeds you don't know by name. The veins on these leaves can be in many patterns.
Roots can be fibrous or tap.
Broadleaf seedlings have two cotyledons, or leaves, that come out of the seed. Common broadleaf weeds include lambsquarters, pigweed, velvetleaf, ragweed. They are long and thin, and the veins run parallel to the length of the leaf. Grasses have fibrous root systems. Grass seedlings send up one rolled leaf, or spike.