This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
1. Yellow Wall Fumitory (Corydalis lutea, D.C.). 2. Wallflower (Cheiranthus Cheiri, L.). 3. Vernal Whitlow Grass (Erophila verna, E. Meyer). 4. Cheddar Pink (Dianthus glancus, Huds.). 5. Field Mouse-ear (Cerastium arvense, L.).
The plant is commonly grown in gardens, being an easily-cultivated plant, covering bare walls, and very prolific, the ordinary loamy garden soil being suited to it.
Essential Specific Characters: 21. Corydalis lutea, D.C. - Stems erect, angular, leaves 3-ternate, lobed, bracts oblong, flowers large, in racemes, spur incurved, short, pods compressed, many-seeded.