Here in Mexico we have Wigandia urens, a big-leaved Scrophulariaceae. It is native to disturbed areas but grows all over vacant lots, and even on roofs. Northwestern India has Cannabis. Because roadsides are like perpetually disturbed habitat, field botany in northwestern India inevitably involves wading through lots of Cannabis either to get to a roadside moringa, or to get through the Cannabis to get into the woods beyond.
So, here are a few photos of our field work, in which you can see just how abundant the plant is.