Corydalis plants and species including Corydalis flexuosa and Corydalis lutea range in color from blue through to yellow and pink. Corydalis lutea is a yellow flowering species while the popular Corydalis elata is a blue flowering woodland plant. Corydalis sempervirens with its yellow and pink flowers is very attractive while Corydalis Yanhusuo is used in Chinese medicine. Corydalis ochroleuca is a white flowering species, and all are clump forming perennials. Nurseries, Mail Order Nurseries, Specialist Nurseries,Retail Nurseries, Wholesale Nurseries.