A collaboration with the Kuebbing/Heberling Lab celebrating knotweed research. The shirt shows the three invasive knotweed taxa found in our field sites in SW Pennsylvania: giant knotweed (Reynoutria sachalinensis, center), Japanese knotweed (Reynoutria japonica, outer edges), and hybrid knotweed (Reynoutria x bohemica, sandwiched between its parents). The leaves are drawn from collections around the Pittsburgh area. Stay visible to your colleagues even in the densest knotweed stands with a bright color!