This drain along Pasir Panjang Road always has weeds growing out from it. But this was the first time I saw a Stachytarpheta indica (Snakeweed) growing at this location, especially since there are no Snakeweed plants along this entire road.
It must have come from HortPark. It was amazing how far its seeds were carried from the park to here. We will see how long it continues to grow here and whether it would proliferate further.