Hemerocallis x 'Erin Prairie' (Liliaceae)
There is "yellow" and there is "Yellow!", and then there is 'Erin Prairie', a tetraploid Daylily cultivar with a beautiful clear rich yellow bloom and a green throat. It is a full-sun perennial which can take drought but loves a wet spot where it can spread. Medium height, at 2-2.5', 'Erin Prairie' is a midseason bloomer.
Bloom color: bright-yellow
Bloom period: early-summer
Container size: Gal.