36-60" tall x 15-18" wide. Serpentine Columbine (Aquilegia eximia) is an uncommon CA native, with huge, downward facing orange and yellow flowers that bloom for many months beginning in late spring. An exceptional Columbine, Aquilegia eximia (also known as King’s Crown Columbine) can be quite tall and is a good choice for planting in shade and semi-shade beds. A vigorous re-seeder, use Serpentine Columbine to naturalize the shady areas of your landscape. Enjoys moisture and alkaline soils.