I snapped these photos near Lake Eola in downtown Orlando.When I compared them to photos I saw online I initially thought they were sweet pea.
Then I saw photos of the snapdragon. The flowers of both plants look very similar. It’s the leaves and stems that give it away though. The snapdragon has much smaller leaves than sweet pea and the leaves are bunched up densely along the stem, giving it sort of a tower look. Sweet pea is much less confined. The stems grow longer and have more of a free-flowing vining look.
As far as landscape gardening, the snapdragon appears much more uniform and easier to control. However, if you have one of those glorious backyard Florida gardens left partially or nearly wholly untamed, sweet pea seems like it would fit in perfectly.
Here are some pages I discovered that have many nice photos of the sweet pea flower: