echinacea, this one is really fun the ay it blooms out of the top. These plants love hot water and once established are pretty drought tolerate in our climate. (Wow, never knew they liked hot water - will have to give mine a treat this summer:)
Echinacea "Double Pink", perennial these are beautiful too & i would love them in conjunction with the papyrus.... i think they would attract a lot of bees though & i don't want bees around the pool. maybe in the front yard below the veggie garden. i wonder how tall they get.