A Close-up View of Three Buttercups
- Photographic study by Brian Johnston of three species of the genus Ranunculus, with many fine images both macroscopic and microscopic.
- http://www.microscopy-uk.org.uk/mag/artnov06/bj-ThreeButtercups.html

Ranunculus trichophyllus
- Several photographs and information on the Thread-leaved Water Crowfoot.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-trichophyllus.htm

Ranunculus hederaceus
- Several photographs and information on the Ivy-leaved Water Crowfoot.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-hederaceus.htm

Ranunculus flammula
- Two photographs of the Lesser Spearwort.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-flammula.htm

Ranunculus Ficaria
- Several photographs and information on the Lesser Celandine, one of the first flowers of Spring.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-ficaria.htm

Ranunculus auricomus
- Photograph of the Goldilocks Buttercup.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-auricomus.htm

Ranunculus bulbosus
- Photograph and information on the Bulbous Buttercup which can be identified by its downturned sepals.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-bulbosus.htm

Ranunculus acris
- Several photographs and information on the Meadow Buttercup.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-acris.htm

Ranunculus repens
- Photograph and information on the Creeping Buttercup.
- http://www.plant-identification.co.uk/skye/ranunculaceae/ranunculus-repens.htm

Ranunculus
- Classification and images.
- http://www.nic.funet.fi/pub/sci/bio/life/plants/magnoliophyta/magnoliophytina/magnoliopsida/ranunculaceae/ranunculus/

Ranunculus hawaiensis
- image
- http://www.botany.hawaii.edu/faculty/carr/images/ran_haw_fl.jpg