The Iceland poppy (P. undicaule), is one of the showiest species, having grey-green pinnate leaves and flowers varying in colour from pure white to deep orange-yellow, orange-scarlet, &c. Specially fine varieties with stalks 18-24 in.
Salicaria is the most familiar plant of this genus, and one of the showiest.
S. Speculum, with numerous open bell-like bright violet-purple flowers, is one of the showiest of our annuals.
The best-known and showiest is D. aizoides, found on old walls and rocks in the west of England.