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。
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 .
大花马齿苋