Bladder Campion is an attractive plant while in bloom. It can be distinguished from other Silene spp. primarily by the attractive pink calyx, with its swollen appearance and complicated network of veins. For other Silene spp., the calyx is usually more green, slender, with fewer conspicuous veins along its length. Another characteristic to consider is the overall hairiness of the plant. For example, Silene pratense (Evening Campion) is often a very hairy plant, while Bladder Campion is usually hairless. Also, some Silene spp., such as Silene noctiflora (Night-flowering Campion), bloom at night, while Bladder Campion blooms during the day. An older scientific name for Bladder Campion is Silene cucubalus, while another common name is Bladder Catchfly, although this species doesn't appear to have sticky hairs.