6 inches to 1 foot.
Flowers in several colours, February to September.
There are several varieties of the garden Fumitory;
the commonest being C. cava, with dull light purple
flowers, which prefers a moist and rather heavy
soil and partial shade, and blooms very early
in the year. C. cava alba is a pure white, also
early flowering. C. lutea produces light yellow
flowers, from May to October; it prefers a drier
root run than C. cava, and will grow on old walls.
All the Corydalis tribe have deeply-cut light
green foliage, almost fern-like, and the flowers
are tailed or spurred in clustered spikes in form
somewhat resembling the Toad-flax. Roots should
be obtained early in the autumn, and planted in
positions suitable to their peculiarities. They
may be left undisturbed for several years.