Spergularia rubra - Photographs and description of this beach species, Sand Spurrey. - http://www.plant-identification.co.uk/skye/caryophyllaceae/spergularia-rubra.htm
Spergularia media - Several photographs and information on this species, Greater Sea-spurrey. - http://www.plant-identification.co.uk/skye/caryophyllaceae/spergularia-media.htm
Spergularia marina - Photographs and identifying features of Lesser Sea-spurrey. - http://www.plant-identification.co.uk/skye/caryophyllaceae/spergularia-marina.htm