Family: Stonecrop [Crassulaceae]

Aeonium

Aichryson

Chiastophyllum

Crassula

Echeveria

Jovibarba

Sedum

Sempervivum

Rhodiola

Umbilicus

Many Stonecrops have 5 petals, such as Biting Stonecrop, English Stonecrop, White Stonecrop, Pink Stonecrop, Orpine, Ice Plant, and Navelwort (which has bell-shaped flowers but with 5 triangular points. But some particular members have 3 petals (Mossy Stonecrop), others 4 petals (Roseroot and Pigmyweed), 6 petals (Reflex Stonecrop), 7 petals (Rock Stonecrop) or 12 petals (Houseleek). It could be argued that the Stonecrops exhibit flowers with the most varied number of petals, rather like chlorine or a transition metal element exhibiting the most valencies.