I have a soft spot for weeds, and this dandelion I saw found a home in a sidewalk crack in busy Yotsuya. I admire the ability of weeds to place themselves, to exist and spread despite our best attempts at organizing our environment. The dandelion is exceptional because it is at once a food, a medicine, and an important early source of nectar for honeybees. Cities need more dandelions!
Tokyo Green Space 
In French it is Dent de lion, I think it is a french phonetic adaptation.
It never occurred to me that dandelions have environmental value! It’s unfortunate that most weeds get lumped under the same umbrella.