This is Japanese knot weed, an invasive species that grows very quickly. It is actually the responsibiblty of all property owners to keep vegetation from spilling from their property into the public right of way. Unfortunately there are way too many instances of property owners not keeping up with this responsibility. This is the case here and further along this sidewalk onto Francis St.
DPW is required to notify the property owner to cut this back and if they don't, only then can we go in to cut it. This process can take up to a month. Please be patient.