Noun: four-o'clock family
- A family of flowering plants of the order Caryophyllales
"The four-o'clock family includes many ornamental garden species";
- Nyctaginaceae, family Nyctaginaceae, Allioniaceae, family Allioniaceae
Type of: caryophylloid dicot family
Part of: Caryophyllales, Chenopodiales, order Caryophyllales, order-Chenopodiales