Coronilla valentina subsp. glauca Citrina, 3LA bushy evergreen shrub, Coronilla valentina subsp. glauca Citrina is notable for its blue grey foliage and pale lemon flowers that bear a delicate scent. A member of the pea family, the flowers start in late winter and continue into spring, often with a second flush in summer, followed by seed pods. It can also be grown up a wall, attaining up to 180cm (6ft) with careful training.