The Sanctuary at Hastings Park is maybe better known as the park at the PNE (Pacific National Exhibition - a two-week summer event, but the location has been fixed for many years and the park is open year round). I think I have identified these, but I usually get something wrong, so corrections are welcome. This should be Sagittaria latifolia, and it is native to BC. It has lots of common names: Broadleaf Arrowhead (Common Arrowhead, Duck Potato, Wapato), and it's in the water-plantain family (Alismataceae). I think this is Impatiens capensis. The E-flora E-Flora BC Atlas Page page intro starts out saying "Jewelweed is a native flowering annual that is found in lightly shaded moist to wet areas ...". But then under Status it says Exotic. Additional Notes indicate that there is some question or dispute about whether it is native or introduced. Here is one of the articles cited (different url, though): "The status of Impatiens capensis (Balsaminaceae) on the Pacific Northwest coast". Peter F. Zika, the author of that article, is pretty convinced that it wasn't collected here until 1950 and is unlikely to be native, and is very likely to be a threat to the native Impatiens ecalarata with which it is often found. It's an interesting issue considering that Zika says pollinators far prefer I. capensis, the one that is the potential threat.