jewelweed

The two words that make up the name of this plant are contradictory but yet both apply to this native herbaceous species.  It has an extremely attractive flower and after a rain, water droplets glisten like diamonds on its leaves.  

And indeed it grew like a weed to cover the large area cleared due to playground construction at Salter Grove.  It can be found in scattered locations throughout the park where there is recently exposed soil and conditions are not too dry.

The showy orange flower dangles on a slender stalk and matures into slender seed capsules that explode to disperse many tiny seeds when touched, giving rise to its other common name "touch-me-not".  

For more information:

https://gobotany.nativeplanttrust.org/species/impatiens/capensis/

http://www.florafinder.com/Species/Impatiens_capensis.php

https://plants.ces.ncsu.edu/plants/impatiens-capensis/