Umbilicus is a kind from 15 to 20 species of plant with flower of the family of the Crassulaceae.

; Principal species:

• Umbilicus chloranthus , South of Balkans
• Umbilicus chrysanthus , the Alps
• Umbilicus erectus , South of Balkans, South of Italy
• Umbilicus heylandianus , Spain, Portugal
• Umbilicus horizontalis , the Mediterranean, Bulgaria
• Umbilicus parviflorus , Greece
• Umbilicus rupestris , South and West of Europe, ïles British.