Fumariaceae
- Botanical characteristics of this family of plants with technical drawings of several species.
- http://delta-intkey.com/angio/www/fumariac.htm

Corydalis lutea
- Photograph of Yellow Corydalis which grows on walls.
- http://www.plant-identification.co.uk/skye/papaveraceae/corydalis-lutea.htm

Corydalis claviculata
- Information and several photographs of Climbing Corydalis.
- http://www.plant-identification.co.uk/skye/papaveraceae/corydalis-claviculata.htm

Fumaria officinalis
- Two photographs of Common Fumitory, and its identifying features.
- http://www.plant-identification.co.uk/skye/papaveraceae/fumaria-officinalis.htm

Fumaria muralis
- Several photographs of the Wall Fumitory, and information on features helping in its identification.
- http://www.plant-identification.co.uk/skye/papaveraceae/fumaria-muralis-agg.htm

Fumaria capreolata
- Information and several photographs of Ramping Fumitory.
- http://www.plant-identification.co.uk/skye/papaveraceae/fumaria-capreolata.htm