Zone 4-8
Height:  30-60cm [1-2ft]
Bloom:  Mid- to late spring bulb flowers are bright yellow with pointed petals that eventually open fully into large yellow stars
Foliage:  Lily-like narrow strap leaves that disappear in later summer
Light:  Sun (especially spring sun) to part shade
Water:  Plenty in spring; little to none in later summer when bulbs go completely dormant 
Soil:  Loose, not too rich, well-drained
Garden location:  Mid-border; mixed with other spring flowers beneath deciduous trees