Any of various fleshy plants of the genus Portulaca,especially P. grandiflora of South America,cultivated for its showy,colorful flowers that open only in sunlight.

• 半枝莲，任一种马齿苋属的肉质植物，尤指南美的大花马齿苋，因其绚丽多彩的花朵而种植，花朵只在阳光下开放。