These flowers can be found in Dundonald Park in the city's core, blooming quite nicely at the moment.
Up on Parliament Hill, I stopped a couple of times to get shots of blossoming trees along the walkway going around the buildings. This first shot looks out towards Major's Hill Park, the Rideau Canal down below. The American embassy is on the left and the Connaught Building is on the right in the background.
I snapped a couple of shots from a little further up on a day with less haze, looking towards the National Gallery and Notre Dame Basilica. I couldn't decide which one I liked more, so here are both of them.