Henderson;s shooting star blooms in very early spring with magenta, lavender or white flowers which have a yellow or whitish tube with a thick, wavy, reddish to reddish-purple ring. The cluster of flowers appear on top of a leafless stem. The seed capsules form small upright cups that hold the small seeds.
Flowers images and a bit more detail about the cultivation: https://en.wikipedia.org/wiki/Dodecatheon_hendersonii
Germination: sown in the fall or spring after cold-moist stratification. Seeds are small and require superficial sowing.