First photo is short growth in area that is normally mowed every few weeks.

Has become the DOMINANT SPECIES along the LAKELANDS TRAIL from Barton Rd to Arnold Rd. More is found east but sparingly but steadily with some in places never seen before. such as at the trailhead to Pinckney Recreation Horsetail #19 west of Kelly Rd and into the horse trail paralleling closest to the Lakelands Trail.

There were off of Barton Rd for the first 1/4 mile with a gradual build up to midway where it chokes out most other ground cover species, dominating acres along both sides of the trail and often into wooded areas beyond. It is heaviest at the Arnold Rd intersection east for a good mile. Interestingly, it is abruptly absent as soon as you cross Arnold Rd, though the environment appears the same (swamps and farms). I walked that stretch for about a 1/4 to the first bridge and no Swallow-Wort present.

A fair number is in University of Michigan's Edwin S George Reserve at the north fence and moving into the lands between the reserve and Lakelands Trail. This might be choked by now.

Notes to myself: They are begging spread down the Lakelands Trail; worst at SE corner Arnold Rd and the Lakelands Trail progressively moving east along and into University of Michigan Edwin S. George Reserve and just east of the reserve on the Lakelands Trail and north up Hinchey Rd where it is beginning to grow at Mangrove Way SW corner and across street at golf course land where Mangrove Way ends into Hinchey. Has also made it down to the next street Emu Way in one remote location where it has not spread due to me pulling it up a few times a year (pulling does not kill as it leaves the roots behind).

SEVERAL PLANTS IN SAME GENERAL AREA LUMPED TOGETHER IN THIS OBSERVATION.