The Fortnight lily gets its name from its recurring two week flowering cycle during spring and into summer. This is a narrow-leaved species that grows to 30 in. tall with medium green leaves that quickly grows to form dense clumps in gardens and landscapes. Pale yellow flowers to 2 in. in dia. have broad overlapping petals with a maroon spot at their base.
It is quite robust and should be divided every 3-4 years to maintain suitable size and character.