navelwort

noun

1. a European plant, Umbilicus rupestris, of the stonecrop family, having fleshy, round leaves and yellowish-green flowers.
2. any of several low, hairy Eurasian plants belonging to the genus Omphalodes, of the borage family, having loose clusters of white or blue flowers.
3. water pennywort.

noun

1. another name for pennywort (def. 1)