Umbilicus luteus, the reniform Venus' navel[citation needed], is a succulent, perennial flowering plant in the family Crassulaceae, in the genus Umbilicus, found in the Southern Balkans and southern Italy.

Umbilicus luteus leaf extract had a highly virucidal effect to Acyclovir (ACV) resistant Herpes Simplex Virus Type 1 in vitro[1]

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