Corydalis (Fumitory).

These low-growing perennials are suitable for dry positions on rock-work. They are not particular as to soil, and may be increased by division of roots, while some scatter seed in abundance. Their flowering period extends over many months. Height, 6 in. to 1 ft.

Related posts:

1. Fumitory.
2. Leontopodium.
3. Anthemis Tinctoria (Yellow Marguerites).
4. Cephalaria (Yellow Scabious).
5. Violas.