Traditional Culture Encyclopedia - Hotel accommodation - What flower has only two petals?

What flower has only two petals?

Tiger thorn plum (scientific name: spurge. Desmoulins), go to Baidu to check.

Euphorbiaceae Euphorbia, a creeping shrub. Leaves alternate, usually concentrated on shoots, obovate or oblong spoon-shaped, entire. Capsule trigonous-ovate. Involucre bell-shaped, yellow-red. Flowering and fruiting period can be found all year round.