Foxglove (Digitalis) above.
Agapanthus, above and below.
Digitalis, derived from Foxglove (above), is a prescription for some heart conditions. But if you don't need it, digitalis can be deadly, just as any portion of this plant has the potential to kill even in small amounts.
Above and below, Japanese maples.
Pachystachys lutea, commonly known as yellow shrimp plant, featured above.
Lobster Claw, above, is another Heliconia flower.
Alternanthera, above, commonly known as Joseph's Coat.
Above, Heliconia, sometimes called False Bird of Paradise
Above, coneflower (Echinacea)
Above and below, I believe this is throatwort (trachelium)