Rough Blazing Star has lance-shaped basal leaves and a single flowering stalk. Along the length of the flowering stalk are 1 inch purple flowers with long, curly styles. Flowers bloom from top to bottom from late summer to early fall, the entire bloom peri ... od lasting about 3 weeks. Flowers attract a variety of bees and butterflies and even see the occasional visit from a hummingbird. Corms are a tasty treat for small mammals, and will often be dug up and eaten, particularly in winter.